[
  {
    "article_id": 352,
    "article_title": "Cervicitis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Cervicitis is considered in any sexually active adolescent with purulent vaginal discharge, intermenstrual or postcoital bleeding, or dyspareunia — but cervicitis is frequently asymptomatic and can be found incidentally on exam. The two defining signs are sought: a purulent or mucopurulent endocervical exudate, and endocervical friability with sustained bleeding after gentle swab passage through the cervical os. The absence of fever or significant pain is typical of isolated cervicitis; if either is present, PID or HSV infection is evaluated for instead."
      },
      {
        "title": "Diagnosis",
        "content": "In a younger adolescent, care is taken to distinguish these findings from normal cervical ectopy so inflammation is not overdiagnosed. Noninfectious causes are kept in mind too — a retained tampon, IUD, or irritation from contraceptive cream or douching can all produce a similar picture."
      },
      {
        "title": "Management",
        "content": "In a sexually active patient with findings consistent with cervicitis, empiric treatment for [[185|gonorrhea]] and chlamydia is started while confirmatory testing is pending, since these are the most frequently identified pathogens. Screening for other sexually transmitted infections is done at the same visit, evaluation for [[106|pelvic inflammatory disease]] is undertaken if there is fever, significant pain, or other concerning features, and counseling on safe sexual practices is provided given the risks of ascending infection (PID, infertility, chronic pelvic pain, ectopic pregnancy), transmission to partners, and increased HIV acquisition risk with exposure. If a foreign body or irritant (tampon, IUD, contraceptive cream, douche) is identified as the likely cause, it is removed or discontinued as part of management."
      }
    ]
  },
  {
    "article_id": 353,
    "article_title": "Cellulitis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In toddlers with facial or buccal cellulitis, especially if unvaccinated, H. influenzae type b and S. pneumoniae are considered; a blue-red, dusky appearance to the skin is characteristic of H. influenzae buccal cellulitis. Fever is not expected to be present - only 10-20% of children with cellulitis are febrile - and blood cultures are usually unrevealing in a well-appearing, immunocompetent child. For any pediatric patient with periorbital erythema, pain, and swelling with fever, careful examination is done to exclude orbital cellulitis, with specific attention to visual disturbance, altered mental status, or signs of sepsis that would indicate spread beyond the orbit."
      },
      {
        "title": "Diagnosis",
        "content": "Exposure history that narrows the likely pathogen is assessed: recent animal bite (Pasteurella, Capnocytophaga), penetrating trauma (S. aureus), fresh or saltwater exposure (Aeromonas or Vibrio, respectively), fish/swine/poultry contact (Streptococcus iniae or Erysipelothrix), neutropenia (Pseudomonas and other gram-negatives are considered), or acute varicella (S. pyogenes superinfection). In an infant under 3 months with cellulitis, full evaluation for invasive infection - blood culture and, usually, lumbar puncture - is undertaken given the risk of group B streptococcal [[350|bacteremia]] and meningitis at this age. Bedside ultrasound is used when an abscess is suspected clinically, since distinguishing a drainable collection from simple cellulitis changes management."
      },
      {
        "title": "Management",
        "content": "For a child over 2 months with mild-to-moderate cellulitis and no fever, lymphadenopathy, or other constitutional signs, oral therapy is started: dicloxacillin or cephalexin, switching to clindamycin if MRSA is a concern based on local prevalence or prior cultures; reliance on trimethoprim-sulfamethoxazole alone is avoided if S. pyogenes without abscess is a realistic possibility, since it does not reliably cover this organism. Escalation to initial parenteral treatment is made for an immunocompromised child, a toxic-appearing child, rapidly progressive lesions, facial or circumferential involvement, or crepitance/violaceous skin change - any of these should prompt admission-level management rather than outpatient oral therapy."
      }
    ]
  },
  {
    "article_id": 354,
    "article_title": "Chronic Diarrhea",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "The pattern is established first: loose or watery stools more than 3 times a day, lasting more than 2 weeks, deviating from the child's prior stool pattern. Whether this looks like small-bowel disease (large-volume stool, no blood/mucus) or large-bowel disease (small-volume stool with blood/mucus) is determined, and growth parameters are checked to see whether failure to thrive accompanies the diarrhea, since this substantially changes the differential. Specific questioning covers nighttime awakening to pass stool — a sign favoring an organic over a functional cause — and diet (excessive juice or carbohydrate intake, low fat intake), medication use (laxatives, antacids), and stressors, since these point toward the common, benign functional entities: toddler's diarrhea in a 6-month-to-5-year-old with normal growth, or [[374|irritable bowel syndrome]] in an older child or adolescent, especially a girl, with symptoms worse after eating or under stress."
      },
      {
        "title": "Diagnosis",
        "content": "In a child under 3, systemic causes are not overlooked — a urinary tract infection is checked for first, since it is the most important systemic cause in this age group, along with [[310|nephrotic syndrome]], sepsis, or an inciting medication. Workup is escalated when [[246|growth failure]], nocturnal stooling, blood/mucus in stool, or a stool volume pattern concerning for a small-bowel process is present, since these argue against a purely functional cause and toward malabsorptive, inflammatory, or infectious disease requiring targeted testing (for example, celiac serologies, stool studies for Giardia or other pathogens, sweat chloride testing, or inflammatory markers depending on the clinical picture)."
      },
      {
        "title": "Management",
        "content": "Treatment is targeted to the cause once identified — a gluten-free diet for celiac disease, anti-inflammatory/immunosuppressive therapy for [[254|inflammatory bowel disease]], pancreatic enzyme replacement for cystic fibrosis or other [[307|pancreatic insufficiency]], or surgery for Hirschsprung disease. If no cause is identified despite a thorough workup, nutrition support (enteral or parenteral as needed) is prioritized to meet the child's needs while continuing evaluation. In an infant with unexplained, high-volume watery diarrhea (over roughly 30 mL/kg/day) who cannot maintain hydration orally, this is recognized as a possible chronic idiopathic diarrhea of infancy and IV fluid support is arranged promptly, given the otherwise high mortality risk without treatment."
      }
    ]
  },
  {
    "article_id": 355,
    "article_title": "Chorioamnionitis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Prolonged rupture of membranes (18 hours or more) is recognized as the classic antecedent to chorioamnionitis but is not required, and most infants exposed to chorioamnionitis will not develop sepsis, which should inform proportionate rather than reflexively aggressive management of the well-appearing exposed newborn. If signs of sepsis develop at any point - respiratory distress, temperature instability, poor perfusion, lethargy - a full diagnostic evaluation (including consideration of lumbar puncture) is pursued and presumptive antibiotics are started rather than continuing observation alone."
      },
      {
        "title": "Diagnosis",
        "content": "It is recognized that \"chorioamnionitis\" is diagnosed clinically at the bedside (maternal fever plus fetal tachycardia, maternal leukocytosis over 15,000/uL, purulent cervical os discharge, or biochemical/microbiologic evidence of infection) but can only be truly confirmed by placental histology after delivery - so a clinical diagnosis, even without histologic confirmation, is sufficient to trigger neonatal evaluation as below. For a well-appearing infant of any gestational age born to a mother diagnosed with chorioamnionitis/Triple I, a limited evaluation is obtained at minimum: blood culture at birth, plus a complete blood count with differential and platelets at birth and/or at 6-12 hours of life (some experts specifically favor the 6-12 hour timing to improve sensitivity)."
      },
      {
        "title": "Management",
        "content": "If the infant is 37 weeks or more gestation and remains well, home observation after 24 hours can be considered, but only if other discharge criteria are met, medical care is readily accessible, and a caregiver able to follow home observation instructions will be present; otherwise the infant is kept in hospital for observation for at least 48 hours until discharge criteria are met. When a structured clinical-observation approach (rather than universal labs) is used at a given center, serial, documented physical assessments are ensured to occur with clear, predefined criteria for escalating to evaluation and treatment, and families are counseled in advance that a later-developing illness in an initially well-appearing infant reflects the expected course of this monitoring strategy, not a care failure."
      }
    ]
  },
  {
    "article_id": 356,
    "article_title": "Cryptorchidism",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "On identifying an [[322|undescended testis]] in a newborn, whether it is unilateral or bilateral and whether the testis is palpable is determined first. Bilateral nonpalpable undescended testes in an apparently normal male newborn should never be assumed benign until the possibility of a fully virilized female with salt-losing [[136|congenital adrenal hyperplasia]] has been excluded, given the potentially fatal consequences of missing this diagnosis. Any cryptorchidism, unilateral or bilateral, occurring with hypospadias — especially severe hypospadias — should prompt evaluation for a disorder of sexual development, including karyotype."
      },
      {
        "title": "Diagnosis",
        "content": "In infants aged 2-6 months, LH, FSH, inhibin B, and testosterone can help establish whether functional testicular tissue is present; beyond that age, an HCG stimulation test serves the same purpose. Imaging (ultrasound, CT, MRI) is reserved for localizing a testis suspected to be in the inguinal region — these modalities are unreliable for finding an intra-abdominal testis, and ultrasound has no role in simply searching for a nonpalpable testis. Renal ultrasound is ordered only if true congenital monorchism is suspected, since this specific entity (not cryptorchidism generally) is linked to ipsilateral renal agenesis."
      },
      {
        "title": "Management",
        "content": "Because spontaneous descent is very unlikely beyond 6 months of corrected age (though about a third to half of cryptorchid testes will have descended spontaneously by around 3 months), referral to a surgical specialist is made if descent has not occurred by 6 months of corrected age. Orchiopexy between 6 and 18 months of age is the goal to best preserve fertility potential; if the child presents later, orchiopexy is still pursued before puberty, since this timing reduces the future risk of testicular malignancy even though it may not fully normalize fertility. An inguinal or scrotal approach is chosen for a palpable testis, and additional surgical evaluation is planned for a nonpalpable one. Hormonal therapy to induce descent is not offered, since it lacks proven long-term effectiveness."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled on the long-term stakes of delayed or missed treatment: roughly 33% reduced fertility with unilateral and 66% with bilateral disease, and a 5- to 10-fold increase in adult testicular cancer risk, with testicular histologic changes possible from as early as 6 months of age."
      }
    ]
  },
  {
    "article_id": 357,
    "article_title": "Chronic Sinusitis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child with persistent cough (often worse lying supine) and rhinorrhea, whether symptoms have ever fully resolved within the typical 10-14 day course of a viral URI is determined first - if symptoms have persisted beyond 90 days (or 12 weeks) without a clear symptom-free interval, chronic sinusitis or chronic rhinosinusitis is favored over a string of separate viral illnesses. Chronic sinusitis is expected to look milder than acute bacterial sinusitis: fever is uncommon and the exam is often normal, so a lack of classic sinus tenderness or fever does not exclude the diagnosis. Any signs suggesting orbital or intracranial extension - periorbital swelling, visual change, severe headache, or altered mental status - are watched for and urgently evaluated, since sinusitis complications (orbital [[353|cellulitis]], brain abscess, epidural/subdural empyema, cavernous sinus thrombosis) occur more often in children than in adults and require prompt escalation of care."
      },
      {
        "title": "Diagnosis",
        "content": "Predisposing conditions are screened for - cystic fibrosis (especially with nasal polyps), primary ciliary dyskinesia, immunoglobulin deficiency, [[98|allergic rhinitis]], and GERD - since these change management and prognosis. Sinus imaging (plain films or CT) is not relied upon to make the diagnosis in uncomplicated cases, since opacification, mucosal thickening, and air-fluid levels are also seen with the common cold."
      },
      {
        "title": "Management",
        "content": "Supportive care is started - saline nasal irrigation, hydration, and acetaminophen or ibuprofen for discomfort - and over-the-counter cold medications or decongestants are avoided in children under 12. Because chronic sinusitis (especially lasting beyond a year) has a different microbiology than typical acute disease, including S. aureus and anaerobes alongside nontypeable H. influenzae and viridans streptococci, empiric antimicrobial therapy is initiated for recurrent acute or chronic sinusitis, with reassessment if there is no improvement. Referral to otolaryngology for endoscopic examination (with or without cultures) is made when a child fails to improve on empiric therapy; in most refractory cases, adenoidectomy is considered as a next step before CT scanning of the sinuses or sinus surgery are pursued."
      }
    ]
  },
  {
    "article_id": 358,
    "article_title": "Drug Overdose",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When a child presents with an unclear overdose, the toxidrome pattern is used to narrow the likely drug class: increased heart rate, blood pressure, and temperature with dilated pupils and reduced sweating suggests an anticholinergic agent (tricyclic antidepressants, antihistamines); reduced heart rate, respiratory rate, and temperature with constricted pupils and reduced sweating suggests an opioid; increased heart rate, blood pressure, respiratory rate, temperature, and sweating with dilated pupils suggests a sympathomimetic (cocaine, amphetamines); and reduced heart rate, respiratory rate, and temperature with no pupillary change suggests a sedative-hypnotic (anticonvulsants, benzodiazepines). For suspected opioid overdose specifically, evaluation looks for stupor or coma, seizures, miosis (unless anoxia has supervened), respiratory depression, cyanosis, and pulmonary edema, and it is kept in mind that polydrug use often complicates the picture."
      },
      {
        "title": "Diagnosis",
        "content": "Intravenous naloxone 0.1 mg/kg (maximum 2 mg) is given for suspected opiate toxicity — pupillary dilation after administration supports the diagnosis, which can be confirmed with urine or serum testing for opiates."
      },
      {
        "title": "Management",
        "content": "Any opioid-naive child who has ingested more than 5 mg of methadone, or any dose of an extended-release opioid, is treated with close observation, since methadone's long duration of action makes even small doses dangerous. When dosing any medication for a child, adult \"maximal safe dose\" references can overdose a smaller pediatric patient — age- or weight-based pediatric dosing (Young's, Fried's, or Clark's rule) is used rather than extrapolating adult doses directly, and liquid medication conversions from ingredient amount to volume are double-checked. If a child has been on round-the-clock opioid dosing for several days, the possibility of dependence and withdrawal on cessation is anticipated, even though specific pediatric withdrawal-management guidance is limited."
      }
    ]
  },
  {
    "article_id": 359,
    "article_title": "Facial Nerve Palsy",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Whether the weakness is central or peripheral, and whether it is congenital/neonatal or acquired, is established first. Peripheral disease is by far the more common pattern in children, especially when facial weakness is an isolated finding. In a neonate, facial asymmetry with crying, a drooping mouth corner, drooling on the affected side, an absent nasolabial fold, and incomplete eye closure are looked for — most such traumatic palsies resolve within the first week, though occasionally over months. In an older child with sudden-onset unilateral weakness involving the frontalis, orbicularis oculi, nasalis, and orbicularis oris, Bell palsy is considered, especially if preceded by an [[274|upper respiratory infection]] and ear or periauricular pain; hyperacusis, impaired tearing, and taste on the anterior two-thirds of the tongue are checked for as supporting findings. True palsy is distinguished from Möbius syndrome (bilateral, with impaired eye abduction) and from congenital absence of the depressor anguli oris (spares forehead, eyelid, and nasolabial fold, and can accompany cardiac anomalies)."
      },
      {
        "title": "Diagnosis",
        "content": "In a Lyme-endemic area, Lyme serology is obtained for any child with isolated facial nerve palsy, even without other systemic symptoms, since facial palsy can be the only presenting sign; bilateral facial weakness favors Lyme over Bell palsy, and fever, malaise, headache, myalgia, or arthralgia preceding the palsy also favor Lyme. If serology is initially negative but suspicion is high, titers are repeated later, since sensitivity increases with time from infection. Lumbar puncture is reserved for evidence of meningoencephalitis (severe headache, nuchal rigidity) — its routine use for isolated facial palsy with Lyme risk alone is controversial."
      },
      {
        "title": "Management",
        "content": "Confirmed Lyme-associated facial palsy is treated with oral antibiotics for 14-21 days. For Bell palsy without an identified cause, symptomatic care and corneal protection (lubricating drops, eye patch) are provided rather than steroids or acyclovir, which have not been shown to improve pediatric outcomes. Referral for further workup is made if recurrence occurs or if there is no improvement after 2-3 months."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that up to 90% of children with Bell palsy recover fully."
      }
    ]
  },
  {
    "article_id": 360,
    "article_title": "Dilated Cardiomyopathy",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In an infant or toddler with tachypnea, tachycardia, weak peripheral pulses, low blood pressure, and hepatomegaly - or in extreme cases frank shock - dilated cardiomyopathy is considered; the classic adult picture of edema and rales is not expected at this age, since gastrointestinal symptoms (abdominal pain, vomiting) and failure to thrive can be the dominant presenting features in young children with heart failure. In an adolescent presenting more like an adult - exertional dyspnea, orthopnea, fatigue, dependent edema, rales, elevated JVP - a gallop rhythm (usually S3) and murmurs of mitral or tricuspid regurgitation from ventricular dilation are listened for specifically."
      },
      {
        "title": "Diagnosis",
        "content": "An echocardiogram is obtained on suspicion of dilated cardiomyopathy. On echocardiography, especially in a younger child being worked up for possible [[100|myocarditis]], normal coronary artery origins are confirmed to rule out an anomalous left coronary artery from the pulmonary artery, which can present similarly to DCM but requires a completely different (surgical) approach. Endomyocardial biopsy is reserved for cases where a specific infectious or inflammatory cause needs confirmation, since it is rarely required and most commonly shows nonspecific mononuclear infiltrates when performed."
      },
      {
        "title": "Management",
        "content": "For acute decompensated heart failure, diuretics, inotropic support (milrinone, or dopamine/dobutamine per center practice), and afterload reduction/vasodilators are used, and [[121|pediatric cardiology]] is involved early given the potential need for mechanical circulatory support. Once a child is stabilized into compensated heart failure, transition is made to an ACE inhibitor (or ARB) and a beta-blocker such as carvedilol, with diuretics as needed."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are counseled that myocarditis-associated presentations often improve spontaneously and that over a third of children show significant improvement in cardiac function over time, while also being prepared for the possibility that transplantation, with or without a bridging mechanical circulatory support device, remains a possible outcome for children who do not recover adequate function."
      }
    ]
  },
  {
    "article_id": 361,
    "article_title": "Foreign Body Ingestion",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In any child with a suspected or witnessed foreign body ingestion, a thorough history is taken and a careful examination performed, evaluating for respiratory distress, oropharyngeal injury, and signs of perforation such as subcutaneous emphysema or peritoneal signs — noting that up to 50% of children are asymptomatic despite true ingestion. Specific questioning covers dysphagia, refusal to eat, drooling, gagging, vomiting, or a foreign-body sensation, which suggest esophageal impaction; the mouth, oropharynx, neck, chest, and abdomen are examined in any child with swallowing difficulty. If a child presents with sudden-onset choking, stridor, or wheezing, foreign body aspiration is presumed until proven otherwise, even though the classic witnessed-choking history is not always present — an unwitnessed aspiration can mimic croup, [[3|bronchiolitis]], or asthma with nonspecific cough, stridor, or wheezing, so suspicion for airway foreign body is maintained with any sudden-onset respiratory symptom. In infants, liquids are the most common cause of choking; in toddlers and older children, small objects and foods such as grapes, nuts, hot dogs, and candy are typical. A nasal foreign body is considered in any child with persistent unilateral, foul-smelling rhinorrhea."
      },
      {
        "title": "Diagnosis",
        "content": "The urgency and approach to removal are based on the object's nature, location, and size, the timing of ingestion, presence of symptoms, and NPO status — coins and most small objects can often be observed for spontaneous passage, but batteries and multiple magnets require urgent attention given their higher risk of serious complications even though they are ingested less often than coins. In a child with recurrent food impaction and dysphagia, eosinophilic esophagitis is evaluated for, which is found in the large majority of such presentations."
      },
      {
        "title": "Management",
        "content": "A foreign body lodged in the esophagus is treated as an emergency because of perforation and sepsis risk. For acute, severe airway obstruction in a conscious child, abdominal thrusts are used. For a suspected esophageal foreign body, prompt evaluation and, if needed, endoscopic removal (about 10-20% of cases) are arranged — surgery is rarely needed (under 1%). A nasal foreign body is removed in the office with appropriate equipment when feasible, with general anesthesia reserved for difficult cases."
      }
    ]
  },
  {
    "article_id": 362,
    "article_title": "Exercise-Induced Asthma",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When a child reports cough, wheeze, or chest tightness with exercise, whether beta-agonist pretreatment controls the symptoms and whether other asthma features are present is determined first; if so, EIB is likely and formal exercise challenge testing is not always necessary. If symptoms are severe, occur with only minimal exertion, or persist despite beta-agonist pretreatment, further evaluation is pursued rather than assuming asthma - vocal cord dysfunction, exercise-induced [[385|laryngomalacia]], exercise-induced hyperventilation, restrictive chest wall disease, exercise-induced arrhythmia, exercise-induced [[143|anaphylaxis]] or reflux, and cardiac shunt lesions are considered. Two clinical patterns are distinguished: bronchospasm or poor endurance appearing during ordinary play, which signals poorly controlled persistent asthma; versus exercise-induced bronchospasm as the sole manifestation in an otherwise well-controlled child."
      },
      {
        "title": "Diagnosis",
        "content": "When objective confirmation is needed, a standardized exercise challenge (treadmill or cycle ergometer) is arranged rather than a methacholine challenge, since MCT cannot diagnose or exclude EIB; the child is instructed to avoid vigorous exercise for at least 4 hours beforehand to avoid a falsely negative result from the exercise refractory period. A drop in FEV1 of 15% or more from pre-exercise baseline at a postexercise interval confirms the diagnosis."
      },
      {
        "title": "Management",
        "content": "Physical activity is not restricted in children with asthma - participation is encouraged, and instead the specific activity or environment (for example, avoiding very cold, dry air) is adjusted as needed based on asthma severity. The pattern of bronchospasm or poor endurance during ordinary play calls for starting or stepping up daily controller therapy, while exercise-induced bronchospasm as the sole manifestation is managed with pre-exercise treatment with a SABA or a leukotriene modifier taken shortly before vigorous activity, which is usually sufficient. Symptoms typically peak 5-10 minutes after stopping exercise and resolve over the next 20-30 minutes, which is useful for setting expectations with families and coaches about timing around practices and competitions."
      }
    ]
  },
  {
    "article_id": 363,
    "article_title": "Gastroesophageal Reflux Disease",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In an infant with frequent, effortless regurgitation who is otherwise well and gaining weight normally, the family is reassured that this is physiologic GER, typically peaking around 3-4 months and resolving by 12-18 months in the great majority of cases as the lower esophageal sphincter matures and the diet shifts to solids. In an older child, specific questions are asked about regurgitation into the mouth, heartburn, and dysphagia, which are the adult-type symptoms typical at this age."
      },
      {
        "title": "Diagnosis",
        "content": "The label GERD, and further workup, is reserved for infants or children with troublesome symptoms or complications: esophagitis-type symptoms (heartburn, regurgitation with discomfort), poor weight gain or [[246|growth failure]], or extraesophageal features such as [[199|chronic cough]], hoarseness, wheezing, or recurrent/chronic rhinosinusitis, especially in a child with a history of reflux as an infant. Esophagitis is confirmed with endoscopy and biopsy rather than treated empirically indefinitely, and alternative causes of recurrent vomiting (by age: gastroenteritis, intussusception, increased intracranial pressure, cyclic vomiting, eosinophilic esophagitis in younger children; functional dyspepsia, appendicitis, IBD, pregnancy, or disordered eating in adolescents) are ruled out before surgery is considered. Targeted testing (24-hour pH/impedance study, endoscopy, sweat chloride, bronchoscopy, or chest imaging) is pursued when the presentation is atypical, symptoms are severe, or the child is under 6 months with unexplained wheezing, rather than assuming reflux is the cause without evidence."
      },
      {
        "title": "Management",
        "content": "Treatment starts with nonpharmacologic measures in infants: feed volumes are reduced, feeds are thickened, and the infant is positioned upright after feeding. In older children, avoidance of foods that trigger symptoms and small, frequent meals are recommended. If symptoms persist or complications (esophagitis) are suspected, acid suppression (e.g., a proton pump inhibitor) is added and a prokinetic is considered if gastroparesis is present. Fundoplication is reserved for medically refractory GERD."
      }
    ]
  },
  {
    "article_id": 364,
    "article_title": "Fetal Alcohol Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "FAS is suspected in a small-for-gestational-age newborn with poor catch-up growth, abnormal tone (increased or decreased), irritability, or tremulousness. Because diagnosis is often missed until school age, suspicion is maintained in an older child who is thin, hyperactive, and shows fine-motor delay, especially with a history suggesting prenatal alcohol exposure."
      },
      {
        "title": "Diagnosis",
        "content": "FAS is confirmed using the full 4-part diagnostic framework rather than facial gestalt alone: at least 2 of 3 facial anomalies (short palpebral fissures at or below the 10th percentile, thin upper lip, smooth philtrum), growth at or below the 10th percentile (prenatal or postnatal), at least 1 structural or functional brain abnormality (small head circumference, or unexplained recurrent nonfebrile seizures), and neurobehavioral impairment. The diagnosis can be made with or without confirmed maternal alcohol use, but it is reserved for infants with a genuine history of substantial in-utero alcohol exposure plus the characteristic features - \"fetal alcohol effects\" is not applied loosely to children with developmental disorders who lack the clinical stigmata. Screening is directed specifically at associated structural anomalies (present in about half of affected children), particularly cardiac, neural tube, and genitourinary defects."
      },
      {
        "title": "Management",
        "content": "Every pregnant patient is counseled that no amount of alcohol during pregnancy is considered safe, and that FAS/FASD is entirely preventable through abstinence - this is the single most impactful prevention message available. Co-occurring environmental adversity is addressed actively, since behavioral problems in children with FASD are often worsened by the same factors that may have contributed to the mother's alcohol use - toxic stress, neglect or abuse, domestic violence, homelessness, and family discord - so families are connected with appropriate psychosocial support alongside developmental and educational services."
      },
      {
        "title": "Prognosis and outcome",
        "content": "For a child already diagnosed anywhere on the FASD spectrum, expectations are set that neurocognitive and behavioral problems are lifelong, but that early recognition and therapy can meaningfully improve outcomes."
      }
    ]
  },
  {
    "article_id": 365,
    "article_title": "Group B Streptococcal Infection",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a neonate presenting within the first week of life, especially within hours of delivery, with respiratory distress, apnea, or shock, early-onset GBS disease is considered — pneumonia with respiratory failure is common and can look like hyaline membrane disease on chest x-ray, and meningitis, while less common in this presentation (5-10% of cases), should still be considered. In an infant presenting between about 1 week and 3 months of age (typically 3-4 weeks) with fever, [[350|bacteremia]], or signs of meningitis, late-onset GBS disease is considered, which accounts for meningitis or occult bacteremia in about 30% of cases; focal infection (bone/joint swelling or pain, skin/soft tissue findings, respiratory symptoms) is also examined for, since [[175|osteomyelitis]], [[227|septic arthritis]], necrotizing fasciitis, pneumonia, adenitis, and [[353|cellulitis]] can all occur, albeit less commonly than bacteremia or meningitis."
      },
      {
        "title": "Diagnosis",
        "content": "The diagnosis is confirmed by culturing blood, CSF, or a focal infection site, and white cell abnormalities like neutropenia support but do not confirm the diagnosis. When evaluating a pregnant patient's obstetric history, maternal GBS colonization (present in 15-35% of pregnant women) combined with intrapartum antibiotic prophylaxis is remembered as the basis for the 85% reduction achieved in early-onset disease — a history of untested or unscreened maternal GBS status in labor should raise the index of suspicion for early-onset disease in a symptomatic newborn."
      },
      {
        "title": "Management",
        "content": "Ampicillin is included in empiric therapy for suspected neonatal meningitis or sepsis in this age group, since it covers GBS along with Listeria and enterococci, the other major pathogens of concern at this age."
      },
      {
        "title": "Prognosis and outcome",
        "content": "When counseling families after a diagnosis of invasive GBS disease, they are told directly about the risk of long-term impact: nearly half of early-onset disease survivors, and about 1 in 5 survivors of GBS meningitis specifically, have moderate to severe neurodevelopmental impairment, so early recognition and treatment matter, and close developmental follow-up is warranted after recovery."
      }
    ]
  },
  {
    "article_id": 366,
    "article_title": "Fragile X Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Physical examination alone is not relied upon to screen for fragile X syndrome in a young child, since the characteristic craniofacial features (long face, prominent forehead, prognathism, large ears) and macro-orchidism typically do not become apparent until the second decade of life, and macro-orchidism is rare before age 6."
      },
      {
        "title": "Diagnosis",
        "content": "A low threshold is kept for ordering fragile X DNA (CGG-repeat) analysis in any boy presenting with unexplained developmental delay, especially when accompanied by social anxiety, hyperactivity, gaze aversion, perseverative language, hand biting, or marked sensory hypersensitivity. Testing is also considered in girls with unexplained developmental delay or autism-spectrum features, since about 30% of girls with the full mutation show cognitive effects, generally milder than in boys. A thorough family history is taken, specifically asking about intellectual disability, premature ovarian failure, and adult-onset tremor/ataxia in relatives, since these can reflect premutation carriage elsewhere in the family and should prompt cascade genetic counseling."
      },
      {
        "title": "Management",
        "content": "A multidisciplinary approach centered on developmental and behavioral monitoring is arranged: routine primary care health supervision, ongoing input from a clinician experienced with fragile X syndrome, and connection to educational and behavioral health resources in the community. Associated findings - hyperextensible joints, mitral valve prolapse, and macro-orchidism developing around puberty - are anticipated and screened for as part of routine follow-up rather than waiting for symptoms to prompt evaluation. Genetic counseling is extended to the family once a diagnosis is confirmed, since the finding has implications for other relatives who may carry a premutation and be at risk for premature ovarian failure or fragile X-associated tremor/ataxia syndrome, and since future pregnancies in the family carry recurrence risk shaped by the anticipation phenomenon (repeat expansion through maternal transmission)."
      }
    ]
  },
  {
    "article_id": 367,
    "article_title": "Heat Exhaustion",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child with weakness, fatigue, headache, nausea, vomiting, dizziness, orthostasis, or [[334|syncope]] after heat exposure or exertion, with a core temperature roughly 37.7-40°C (100-104°F) and only mild or absent CNS dysfunction, heat exhaustion is diagnosed."
      },
      {
        "title": "Diagnosis",
        "content": "The water-depletion pattern (fever, intense thirst, hyperventilation, paresthesias) is distinguished from the salt-depletion pattern (severe muscle cramps, anorexia, diarrhea, orthostatic hypotension, [[170|hyponatremia]], hemoconcentration, low urine sodium) — the latter especially in a child with cystic fibrosis, whose sweat sodium losses do not normalize with acclimatization. Critically, this is differentiated from [[295|heat stroke]]: a core temperature above 104-105°F with stupor, coma, seizure, or other significant CNS dysfunction, hot/possibly dry skin, and hemodynamic instability signals heat stroke, a life-threatening emergency requiring immediate aggressive cooling and ICU-level care rather than the measures used for heat exhaustion."
      },
      {
        "title": "Management",
        "content": "The child is moved to a cool environment, excess clothing is removed, and active cooling is applied with fans and ice packs or ice water over the groin and axillae. Oral rehydration with electrolyte-containing fluids is given if tolerated; IV fluids are used if oral intake is not possible. Rectal temperature is monitored continuously during cooling, with active cooling stopped once the temperature falls below about 38.9°C (102°F) or the child begins shivering, to avoid overcooling. Close attention is paid to any sign of CNS dysfunction or hemodynamic instability during treatment, since this would indicate progression to heat stroke and the need for emergency transport and intensive care. For prevention in returning athletes, the modifiable risk factors are addressed directly: acclimatization time is built in, adequate hydration and salt replacement are ensured, adequate recovery is scheduled between exercise bouts, and clothing/equipment that allows heat dissipation is chosen."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are reassured that full recovery is expected for heat exhaustion once appropriately treated."
      }
    ]
  },
  {
    "article_id": 368,
    "article_title": "Hypocalcemia",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a neonate with hypotonia, jitteriness, tetany, clonus, seizures, respiratory distress, or [[138|feeding difficulty]], the timing of onset is noted: before 72 hours favors a transient, birth/pregnancy-related cause (prematurity, maternal diabetes, asphyxia, hypomagnesemia), while onset after the first week favors a more lasting pathology (hypoparathyroidism/DiGeorge, high-phosphate formula or cow's milk intake, severe maternal [[326|vitamin D deficiency]]). In an older child with irritability, lethargy, muscular twitching, tremulousness, or seizures, similar screening is performed."
      },
      {
        "title": "Diagnosis",
        "content": "Ionized calcium is checked (preferred over total calcium alone). Dysmorphic features or congenital heart disease are looked for as clues to DiGeorge syndrome, and an ECG is obtained to check for QT prolongation. Phosphate, PTH, 25(OH)-D, and 1,25(OH)2-D are checked to localize the cause — and magnesium is always checked, since coexisting hypomagnesemia can make hypocalcemia refractory to treatment until corrected."
      },
      {
        "title": "Management",
        "content": "Most infants are managed conservatively with early nutrition and close monitoring, since the majority remain asymptomatic. Intravenous or oral calcium replacement is given for symptomatic neonates. For chronic hypocalcemia due to hypoparathyroidism, oral calcium salts, generally combined with vitamin D, are used as the preferred long-term approach. If hypocalcemia proves resistant to standard calcium/vitamin D replacement, magnesium status is checked and corrected before calcium therapy is escalated further. Breastfeeding is favored over formula where relevant, since formula feeding is associated with a higher rate of hypocalcemia in term infants, and high-phosphate cow's milk or formula is avoided in infants at risk for late-onset hypocalcemia."
      }
    ]
  },
  {
    "article_id": 369,
    "article_title": "Glomerulonephritis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child with dark (cola- or tea-colored) urine, urinalysis and exam are checked for the full nephritic picture - [[187|hematuria]] with red blood cell casts, proteinuria, hypertension, and edema; RBC casts essentially confirm a glomerular/vasculitic source and exclude extrarenal bleeding. Serum C3 is checked as an early branch point: low C3 with elevated ASO/streptozyme supports APSGN (the most likely diagnosis in a 4-12-year-old with a preceding pharyngitis, otitis media, or skin infection 1-6 weeks earlier), while a normal C3 shifts the differential toward IgA nephropathy, ANCA vasculitis, or anti-GBM disease. Specific questions are asked about recurrent painless macroscopic hematuria, which points to IgA nephropathy but can also be an early presentation of Alport syndrome in the first decade of life."
      },
      {
        "title": "Diagnosis",
        "content": "Urgent escalation is warranted when a child with GN shows a rapidly progressive course - worsening renal function, especially with anemia, marked hypertension, and edema out of proportion to a typical self-limited postinfectious picture - since this raises concern for RPGN or a crescentic process requiring biopsy and consideration of immunosuppression. Pulmonary hemorrhage in a child with glomerulonephritis is treated as a medical emergency suggesting anti-GBM disease (Goodpasture syndrome) or ANCA vasculitis, since delayed treatment can be fatal."
      },
      {
        "title": "Management",
        "content": "Admission is arranged for renal insufficiency, oliguria, or acute hypertension, with the latter managed aggressively with fluid/salt restriction and antihypertensive therapy. For a child with biopsy-proven MPGN/C3 glomerulopathy or another chronic GN, care is coordinated with pediatric nephrology for immunosuppressive treatment."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Families are reassured that typical APSGN has an excellent prognosis, with most children recovering fully even though microscopic hematuria can linger for up to a year, and are counseled that response in chronic GN varies by the specific underlying mechanism rather than following one predictable course."
      }
    ]
  },
  {
    "article_id": 370,
    "article_title": "Hair Loss",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Evaluation starts by classifying the pattern: diffuse versus circumscribed, and congenital versus acquired, since this framework (congenital diffuse, congenital localized, acquired diffuse, acquired localized) narrows the differential substantially. For circumscribed acquired hair loss, close examination looks for the three leading causes: a smooth, well-demarcated bald patch suggests [[346|alopecia areata]]; scaling with broken hairs (sometimes black dots) suggests [[339|tinea capitis]]; and hairs of variable, uneven length with an irregular pattern (crown, occipital, parietal areas), sometimes with scalp crusting, suggests trichotillomania. For diffuse hair loss, specific questions are asked about events 2-4 months prior (illness, surgery, childbirth, high fever, new medication, crash dieting, or major stress), since this history points to telogen effluvium. Anagen effluvium is considered in any child on chemotherapy or radiation who develops hair loss."
      },
      {
        "title": "Diagnosis",
        "content": "A Wood lamp exam is performed if tinea capitis is suspected, but a negative result does not exclude the diagnosis, since T. tonsurans - the dominant US cause - does not fluoresce; fungal culture/microscopy follows if suspicion remains. Associated autoimmune conditions (thyroid disease, vitiligo) are screened for in alopecia areata, and the nails are checked for pitting on exam."
      },
      {
        "title": "Management",
        "content": "For alopecia areata, topical or intradermal triamcinolone is offered. For telogen effluvium, reassurance alone is usually sufficient once the inciting stressor is identified and addressed. For tinea capitis, systemic antifungal therapy is started rather than topical treatment, since topical agents cannot penetrate the hair shaft; kerion-type presentations are treated the same way, since most respond well without incision. For trichotillomania, a strong therapeutic alliance is built with the child and family, cognitive behavioral therapy is initiated, and adjunct medication (clomipramine or N-acetylcysteine) is considered for refractory cases, recognizing the OCD-spectrum nature of the behavior."
      },
      {
        "title": "Prognosis and outcome",
        "content": "For telogen effluvium, reassurance is given that regrowth is expected over 6-12 months. For alopecia areata, families are counseled that about half of children regrow hair fully within a year, though relapse can occur."
      }
    ]
  },
  {
    "article_id": 371,
    "article_title": "Influenza A",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In an older child or adolescent, the classic syndrome is expected — sudden high fever, severe myalgia, headache, and chills that overshadow coryza, pharyngitis, and cough — with a typically unremarkable chest exam and absence of rash, marked conjunctivitis, adenopathy, exudative pharyngitis, or dehydrating enteritis (features that would suggest a different diagnosis). In infants and young children, a less distinct picture is expected: fever, diarrhea, vomiting, and abdominal pain are common, and the child may look highly febrile and toxic or present with a sepsis-like illness with apnea, prompting a full sepsis evaluation."
      },
      {
        "title": "Diagnosis",
        "content": "In children under 5, and especially under 2, laboratory confirmation (rapid antigen test or PCR) is obtained given their higher complication risk, rather than relying on clinical diagnosis alone."
      },
      {
        "title": "Management",
        "content": "Antiviral treatment is started for any child hospitalized with presumed [[298|influenza]], any child with confirmed or suspected influenza and severe/complicated/progressive illness, any child at high risk for complications regardless of vaccination status, and any otherwise healthy child for whom the provider feels shortened symptom duration is clinically warranted. Acetaminophen or another nonsalicylate antipyretic is used for fever control — never aspirin or salicylate-containing products, given the risk of Reye syndrome. Patients are watched for, and counseled on, the range of possible complications: secondary bacterial infection (particularly pneumonia), sinusitis, otitis media, encephalitis, [[100|myocarditis]], myositis, and croup (which can be especially severe with influenza A)."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Expectations are set that while the febrile illness usually resolves in 2-4 days and overall illness in 3-7 days, cough and subtle airway dysfunction can linger for weeks."
      }
    ]
  },
  {
    "article_id": 372,
    "article_title": "Hiv Infection",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Suspicion for HIV infection is maintained in any infant with unexplained, persistent fevers, generalized lymphadenopathy, hepatosplenomegaly, failure to thrive, persistent/recurrent oral or diaper candidiasis, recurrent diarrhea, or chronic parotid swelling - especially when findings persist beyond what is typical for isolated common illnesses. Up to 20% of untreated infected infants present in the first 3-6 months of life with an AIDS-defining illness such as PJP, and CD4 count can be misleadingly normal even during PJP in an infant, so a normal CD4 does not exclude serious opportunistic infection in this age group."
      },
      {
        "title": "Diagnosis",
        "content": "In a known HIV-infected child presenting acutely, the child is roomed quickly to reduce nosocomial infection risk, pulse oximetry is checked at triage (indolent hypoxemia can be an early PJP sign), and a lower threshold for serious bacterial or viral sepsis is maintained given the underlying immunosuppression. Screening for hepatitis C coinfection is performed when relevant perinatal risk factors are present, using molecular (PCR) testing rather than relying on antibody testing alone, since some coinfected children do not seroconvert."
      },
      {
        "title": "Management",
        "content": "Pneumocystis jirovecii pneumonia prophylaxis is added as indicated. Clinical stage and CD4+ T-lymphocyte count/percentage are tracked over time as the primary immunologic and prognostic markers in children under 13. The psychosocial dimension is addressed proactively - families are guided on disclosure timing and content for the child and siblings, confidentiality is safeguarded, and structured adherence support is provided, since these factors are as important to long-term outcomes as the antiretroviral regimen itself."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Long-term adherence to combination antiretroviral therapy is ensured, since consistent ART use is what has transformed pediatric HIV from a near-uniformly fatal diagnosis into a condition compatible with essentially normal childhood and survival into adulthood."
      }
    ]
  },
  {
    "article_id": 373,
    "article_title": "Insulin Resistance",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Any obese child is examined for acanthosis nigricans (velvety hyperpigmentation, classically axillary), present in over 60% of children with BMI above the 98th percentile, as a marker prompting evaluation for insulin resistance and associated [[333|metabolic syndrome]] features (hypertension, HDL under 40 mg/dL, triglycerides over 150 mg/dL). If acanthosis nigricans or other insulin-resistance features are present without obesity, or with signs of androgen excess (hirsutism, irregular periods, polycystic ovaries), a genetic insulin receptor defect (type A insulin resistance in adolescence) or an underlying endocrinopathy (Cushing syndrome, PCOS, thyroid disease, acromegaly) or medication effect is considered rather than assuming simple obesity-related insulin resistance. In an infant with intrauterine growth restriction plus fluctuating hypoglycemia and hyperglycemia and profound insulin resistance, Donohue or Rabson-Mendenhall syndrome is considered."
      },
      {
        "title": "Diagnosis",
        "content": "Genetic testing of the insulin receptor gene is pursued promptly given the poor prognosis of Donohue syndrome. Comorbidities that share the insulin-resistance pathway, particularly PCOS and [[311|obstructive sleep apnea]], are proactively screened for. In a child with CKD, insulin resistance and hyperlipidemia are monitored for even at early disease stages, since more than half develop hyperlipidemia by the time they reach ESRD."
      },
      {
        "title": "Management",
        "content": "A 6-month trial of lifestyle modification — dietary changes and increased physical activity — is used as first-line treatment for obesity-associated insulin resistance and any associated dyslipidemia; metformin is not started for insulin resistance alone, and a child with insulin resistance but normal glucose concentrations is never treated with metformin, since it is not currently recommended for this indication despite some short-trial benefit signals. Any child with prediabetes or type 2 diabetes found on screening is referred to a pediatric endocrinologist, and identified comorbidities are managed accordingly. For MODY, subtypes are distinguished: MODY 1 and 3 usually respond to sulfonylureas as first-line therapy, while MODY 2 needs no pharmacologic treatment given its benign course."
      }
    ]
  },
  {
    "article_id": 374,
    "article_title": "Irritable Bowel Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child with recurrent, crampy abdominal pain and altered bowel habits, the Rome IV framework is applied: abdominal pain at least 4 days per month for 2 months, tied to defecation or a change in stool frequency/form, in a child who otherwise looks well. The reassuring pattern is confirmed: no nighttime diarrhea, good appetite, normal growth, and no weight loss, fever, rectal bleeding, or anemia. Any of these alarm features — or nighttime symptoms — should prompt evaluation for [[254|inflammatory bowel disease]] or celiac disease rather than a presumptive IBS diagnosis."
      },
      {
        "title": "Diagnosis",
        "content": "Late-onset [[255|lactose intolerance]] and excess fructose/sorbitol intake, common IBS mimics, are ruled out with a careful dietary history, and celiac serologies are checked as part of the workup. If constipation and pain coexist, the constipation is treated first before ongoing symptoms are attributed to the IBS-constipation-predominant subtype."
      },
      {
        "title": "Management",
        "content": "Management starts with dietary measures: a high-residue/high-fiber diet for diarrhea-predominant symptoms, and any specific dietary triggers identified (excess fructose, sorbitol, or lactose) are addressed. Anticholinergic medication is added for pain, and a tricyclic antidepressant is considered for diarrhea-predominant IBS specifically, under experienced supervision given the need for careful monitoring in children. Probiotics or peppermint oil are offered as adjuncts, recognizing variable response, and referral for behavioral treatment or psychotherapy is made, since these are among the more effective interventions and address the stress/anxiety component of the gut-brain interaction underlying IBS."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Expectations are set with families that IBS is a benign, functional condition without long-term structural damage, but that management is often a process of trial and adjustment rather than a single definitive fix."
      }
    ]
  },
  {
    "article_id": 375,
    "article_title": "Idiopathic Intracranial Hypertension",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child or adolescent with chronic or progressive headache, particularly with visual symptoms (obscurations, photopsia, diplopia), tinnitus, or a cranial nerve VI palsy, papilledema is examined for. Prepubertal children with IIH do not show the same female-and-obesity risk pattern seen in adolescents and adults, so the absence of obesity is not used to lower suspicion in a younger child."
      },
      {
        "title": "Diagnosis",
        "content": "MRI/MRV of the head is obtained before proceeding to lumbar puncture, since IIH is a diagnosis of exclusion requiring normal neuroimaging. Structural causes are actively ruled out - mass lesion, hydrocephalus, optic glioma, craniopharyngioma, or venous sinus thrombosis (especially with a history of clotting risk, or complicated otitis media/mastoiditis) - since papilledema and raised pressure from these causes can be mistaken for IIH, and false-positive IIH diagnosis is common when this step is skipped. Once neuroimaging is normal, the diagnosis is confirmed with an elevated opening pressure on lumbar puncture performed in the lateral decubitus position. A directed medication and exposure history is taken: recent high-dose vitamin A/retinoid use, tetracycline or doxycycline (common in adolescents being treated for acne), growth hormone therapy, oral contraceptive use, or recent steroid withdrawal are all recognized associations."
      },
      {
        "title": "Management",
        "content": "Initial treatment is directed at both symptomatic pain relief and, more importantly, prevention of visual loss, since reversible visual deficits can become permanent without timely intervention - prompt ophthalmologic assessment of papilledema and visual fields is arranged. Most children can be managed as outpatients; admission is reserved for those needing continued parenteral therapy to control symptoms. Referral to neurology is made for any child with chronic or recurrent symptoms requiring prophylactic treatment, and close follow-up of visual function is arranged given the reversible-but-time-sensitive nature of IIH-associated visual loss."
      }
    ]
  },
  {
    "article_id": 376,
    "article_title": "Juvenile Polyp",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child aged 2-10 (especially 3-4 years) with intermittent, painless blood on a formed stool, a juvenile polyp is considered the most likely cause, particularly if the child is otherwise well. Large-polyp symptoms (diarrhea, tenesmus, colicky pain) or intussusception are evaluated if a polyp is suspected as a lead point. Concern is raised for juvenile polyposis syndrome, rather than a benign solitary polyp, if colonoscopy reveals five or more juvenile polyps, if polyps are found in the stomach or small intestine, or if there is a family history of juvenile polyposis syndrome. In an infant under 2 with rectal bleeding plus [[354|chronic diarrhea]], failure to thrive, or protein-losing enteropathy, juvenile polyposis of infancy is considered, a severe form that may need early endoscopic or surgical intervention. Peutz-Jeghers syndrome is distinguished by its characteristic perioral/mucocutaneous pigmentation and family history, and concern for a premalignant adenomatous polyp (with a roughly decade-long transformation window) is reserved for children with a family history of familial adenomatous polyposis or Gardner syndrome."
      },
      {
        "title": "Diagnosis",
        "content": "A gentle digital rectal exam is performed, since solitary rectal polyps are often palpable — but this proceeds carefully, as a torn polyp stalk can bleed briskly. Colonoscopy is pursued rather than relying on rectal exam alone, since it is both diagnostic and therapeutic (biopsy, snare polypectomy) and detects the synchronous polyps present in up to half of affected children. Occult blood loss and anemia are considered an alternative presentation in 20-25% of cases, even without visible bleeding. Removed polyps are always sent for histology to confirm which of these categories applies before finalizing counseling and follow-up plans."
      },
      {
        "title": "Management",
        "content": "Any of these findings changes the malignancy risk profile dramatically (about 30-fold increased colorectal cancer risk) and warrants genetic counseling and a structured surveillance plan rather than simple removal and reassurance."
      }
    ]
  },
  {
    "article_id": 377,
    "article_title": "Insomnia",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Evaluation starts by placing the sleep complaint in context: questions are asked about family factors (parental stress, maternal depression), child factors (temperament, developmental stage), and the sleep environment (noise, light, room temperature, bedding, cultural sleeping arrangements), since insomnia is often defined more by parental concern than objective criteria. In infants and toddlers, sleep-onset association type (child needs rocking, feeding, or parental presence to fall or return to sleep, cannot self-soothe after normal brief nighttime arousals) is distinguished from limit-setting type (bedtime stalling or refusal from inadequate caregiver limits) - both are common in the 6-month to 2-year range, affecting 20-30% of infants, toddlers, and preschoolers, and both respond to consistent bedtime limits and sleep hygiene rather than medication. In older children and adolescents, specific questions are asked about worry surrounding sleep itself (suggesting psychosocial/primary insomnia), inadequate sleep hygiene (irregular schedules, caffeine, screens/homework/TV in bed, large weekday-weekend shifts), and symptoms of an underlying [[94|mental health]] or neurodevelopmental condition (anxiety, depression, ASD, ADHD), since insomnia due to a mental disorder tracks that condition's severity. Ordinary nighttime fears (tearful, fearful bedtime behavior from normal cognitive development, relieved by sleeping near a household member) are distinguished from true insomnia so families are not treated for the wrong problem."
      },
      {
        "title": "Diagnosis",
        "content": "A primary insomnia diagnosis is reserved for symptoms lasting at least 1 month with significant functional impairment or distress and no better explanation, and comprehensive evaluation (with sleep specialist or behavioral psychology referral as needed) is pursued when insomnia appears secondary to another medical or [[179|sleep disorder]]."
      },
      {
        "title": "Management",
        "content": "Management leads with behavioral treatment: for young children, caregivers are coached on consistent bedtime limits, an appropriate sleep-conducive environment, and helping the child build self-soothing skills rather than relying on parental presence to fall asleep. For older children and adolescents, behavioral interventions targeting sleep-related worry are applied and inadequate sleep hygiene is corrected (consistent sleep/wake times, removing screens and stimulating activities near bedtime, restricting the bed to sleep). Medication is treated as a last resort in otherwise healthy children - agents like diphenhydramine, clonidine, or melatonin are used in practice, but indiscriminate use can obscure the real cause of insomnia and short-circuit needed behavioral work, so any medication trial is paired with, not used instead of, behavioral management."
      }
    ]
  },
  {
    "article_id": 378,
    "article_title": "Language Delay",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When a parent raises concern about delayed speech, the first step is to characterize whether development follows the normal sequence at a slower pace (delay) or shows an atypical/deviant pattern (possible disorder), and to note whether expressive language alone or both receptive and expressive language are affected. Birth order, bilingual home exposure, or \"laziness\" are not accepted as an explanation — these have never been shown to cause delay, and accepting them risks missing a true underlying cause. If the delay is dissociated across language domains (e.g., markedly different expressive versus receptive skills) rather than a uniform slower pace, this preschool pattern is considered to meet DSM-5 criteria for language disorder rather than simple delay, which should prompt more structured, ongoing therapy rather than a wait-and-see approach."
      },
      {
        "title": "Diagnosis",
        "content": "Screening is directed specifically at the most common causes: overall developmental level is assessed (intellectual disability accounts for about half of cases, with speech often disproportionately delayed relative to other domains), formal audiologic testing by an audiologist (not an in-office screen) is arranged given how commonly [[248|hearing loss]] underlies delay, and examination looks for structural anomalies (cleft palate) or signs of [[117|autism spectrum disorder]]. Questions are asked about chronic ear infections/effusion, prematurity, and family history of language or reading difficulty, all of which raise risk. A multidisciplinary evaluation is arranged for any child with a persistent or concerning language delay: psychologic/neurodevelopmental evaluation with social-skills assessment, formal speech-language evaluation, audiologic assessment, and a full pediatric exam."
      },
      {
        "title": "Management",
        "content": "Referral is not delayed for an extended \"wait and see\" period — early intervention improves outcomes."
      },
      {
        "title": "Prognosis and outcome",
        "content": "About 60% of children with early delay catch up by age 4, especially with timely support, while persistent delay at school age carries real risk for language-based [[114|learning disability]]. Expectations are set that therapy improves outcomes but a true language disorder often does not fully resolve, so ongoing monitoring into the school years is appropriate even after initial improvement."
      }
    ]
  },
  {
    "article_id": 379,
    "article_title": "Intracranial Hemorrhage",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a preterm infant, especially very low birthweight (under 1,500 g), a high index of suspicion is maintained for germinal matrix/[[299|intraventricular hemorrhage]], which is often spontaneous and can occur without apparent trauma; unexplained motor agitation together with apnea or breathing irregularity should raise concern for intracerebellar parenchymal hemorrhage specifically. In a well term neonate with new-onset, characteristically brief seizures and an otherwise normal interictal exam around day 2 of life, primary subarachnoid hemorrhage is considered. In an older child, sudden severe headache, especially with vomiting, irritability, seizures, or altered sensorium, is treated as a possible significant intracranial bleed; small hemorrhages can present subtly and be missed without a high index of suspicion. Hemorrhagic stroke is considered in any child with [[162|sickle cell disease]] presenting with acute neurologic symptoms, since SCD raises risk of both ischemic and hemorrhagic stroke."
      },
      {
        "title": "Diagnosis",
        "content": "Primary subarachnoid hemorrhage is confirmed by CT or MRI (lumbar puncture can be suggestive). In an older child with sudden severe headache, CT is obtained promptly. Once hemorrhage is confirmed, further work-up is tailored to age and clinical context: in neonates, birth trauma, hypoxic-ischemic injury, and coagulopathy/[[400|thrombocytopenia]] (including fetal/neonatal alloimmune thrombocytopenia) are considered for extra-axial term hemorrhage, versus prematurity-related germinal matrix fragility for IVH. In older children, vascular imaging (angiography in selected cases) is pursued to look for a congenital vascular anomaly, the most common cause of childhood hemorrhagic stroke, and coagulation studies and platelet count are checked, particularly in a child with cancer, where spontaneous ICH is essentially confined to those with platelets under 5,000/uL. When a cavernous malformation is found (often incidentally on MRI), the Zabramski classification, hemorrhage history, and lesion location (brainstem carries higher risk) are assessed."
      },
      {
        "title": "Management",
        "content": "Any coagulopathy or severe thrombocytopenia in a child with cancer and spontaneous ICH is corrected urgently. Assessment of a cavernous malformation's classification, hemorrhage history, and lesion location guides referral for surgical excision versus observation."
      },
      {
        "title": "Prognosis and outcome",
        "content": "For primary subarachnoid hemorrhage, reassurance is given that long-term outcome is typically good once confirmed."
      }
    ]
  },
  {
    "article_id": 380,
    "article_title": "Lateral Ligament Injury",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child presenting with ankle pain, swelling, and bruising after an inversion/plantarflexion injury, careful examination is done to localize tenderness. In a toddler with an unwitnessed fall and new limp or refusal to walk, toddler's fracture and occult foot fractures are kept on the differential even when x-rays look clean."
      },
      {
        "title": "Diagnosis",
        "content": "If tenderness is confined to the distal fibula and/or adjacent lateral ligaments, distal to the tibial anterior joint line, the Low-Risk Ankle Rule is applied — this pattern is 100% sensitive for excluding a clinically important fracture in children ages 3-16 and can safely avoid radiography, covering lateral ankle sprains, nondisplaced Salter-Harris I/II fractures of the distal fibula, and avulsion fractures. If tenderness extends beyond this distribution, or the child is too young to reliably localize pain, radiographs are obtained, keeping in mind that a real physeal or [[219|occult fracture]] can still be present despite an initially normal film. For a confirmed lateral ligament sprain, the injury is graded (1: stretch, 2: partial tear, 3: complete tear) to guide expectations, with MRI reserved for suspected grade 3 injury or concern for concomitant intra-articular derangement."
      },
      {
        "title": "Management",
        "content": "For a confirmed lateral ligament sprain, management is conservative, with ice, elevation, and a protective brace. When a young child has a normal initial x-ray but a clinical picture concerning for toddler's fracture, Salter-Harris I injury, or stress fracture, the injury is immobilized empirically and follow-up imaging is planned in 1-2 weeks, since radiographic confirmation is often delayed even when a true fracture is present — this avoids both unnecessary anxiety over a falsely reassuring film and the risk of growth disturbance from an unrecognized, unprotected physeal injury."
      }
    ]
  },
  {
    "article_id": 381,
    "article_title": "Juvenile Dermatomyositis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "JDM is suspected in a child (median onset 7-11 years, bimodal peak at 3-7 years and early adolescence, girls more often than boys) with gradually progressive, symmetric proximal muscle weakness together with a heliotrope eyelid rash and/or Gottron papules over the knuckles or elbows. In a child with proximal weakness but no rash, juvenile polymyositis or muscular dystrophy is considered, since JPM is managed identically to JDM once confirmed."
      },
      {
        "title": "Diagnosis",
        "content": "The Bohan and Peter criteria are applied: with the classic rash present, at least 3 of symmetric proximal weakness, elevated muscle enzymes (CK, AST, LDH, aldolase), characteristic EMG findings, or biopsy showing necrosis and inflammation are confirmed - though a normal CK does not exclude the diagnosis. MRI (STIR/T2 fat-saturated) is ordered as the preferred first-line imaging study to demonstrate symmetric proximal muscle inflammation (thighs, especially vastus lateralis/intermedius, more than pelvis or shoulders), with muscle biopsy or EMG reserved for diagnostically uncertain cases; the same enzyme/MRI work-up is pursued in a child with proximal weakness but no rash. The nailfolds are examined for capillary dilation with dropout, a useful supportive sign. Routine malignancy screening is not pursued in a child with JDM - unlike adult dermatomyositis, childhood disease is not a paraneoplastic syndrome. Screening is directed at extramuscular vasculopathic involvement instead: questions are asked about abdominal pain (intestinal ischemia risk), skin is monitored for ulceration, and cough or progressive dyspnea suggesting interstitial lung disease is watched for, with KL-6, anti-MDA5, anti-Jo-1, and IL-18 checked when ILD is a concern, since elevated levels flag risk for a rapidly progressive course."
      },
      {
        "title": "Management",
        "content": "Early referral is made to [[221|pediatric rheumatology]]. In a child with skin findings alone and minimal muscle involvement (amyopathic JDM), follow-up is arranged over several years."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Dystrophic calcinosis is anticipated as a possible late finding (about 30% of patients), typically periarticular and appearing months to years after onset. In a child with amyopathic JDM, reassurance is given that the pediatric form, unlike the adult one, is not linked to malignancy or interstitial lung disease, but up to about a quarter go on to develop overt myositis. JDM is relatively responsive to immunosuppressive therapy, and prompt, adequate treatment improves long-term outcomes."
      }
    ]
  },
  {
    "article_id": 382,
    "article_title": "Myelomeningocele",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "At birth, the visible spinal defect is examined to characterize it as covered by thin epithelialized tissue or an exposed neural placode, and CSF leakage is watched for if a membrane is present, which raises infection risk and urgency for surgical closure. Bladder and bowel function are assessed specifically — constant dribbling with a relaxed sphincter versus a high-pressure bladder with dyssynergy — since both patterns require urologic involvement from the outset."
      },
      {
        "title": "Diagnosis",
        "content": "A careful neurologic exam is performed to localize the lesion level: lower-extremity tone and reflexes (flaccid paralysis and absent deep tendon reflexes below the lesion) and response to touch and pain are assessed, and associated deformities (clubfoot, hip subluxation) that reflect abnormal in-utero movement are looked for. Cranial imaging is obtained given the near-universal association with Chiari II malformation and the 80-85% likelihood of hydrocephalus requiring shunt placement."
      },
      {
        "title": "Management",
        "content": "A multidisciplinary team is established early — neurosurgery, urology, orthopedics, genetics, physiotherapy, and a coordinating primary care physician — since myelomeningocele affects nearly every organ system and requires lifelong management rather than a single intervention. Shunt complications and infections are monitored for, particularly in infancy, given their impact on cognitive development. Motor status is tracked over time: most children remain stable postoperatively, so new neurologic deterioration should prompt evaluation for tethered cord (the most common cause, a diagnosis of exclusion), syringohydromyelia, or cervical myelopathy from Chiari II, rather than being dismissed as expected progression. Latex precautions are taken throughout care given the roughly one-third prevalence of latex hypersensitivity."
      },
      {
        "title": "Prognosis and outcome",
        "content": "When a family considering prenatal surgery is counseled, the MOMS trial findings are presented accurately: prenatal repair can reduce shunt need and improve 30-month motor outcomes but carries real maternal and fetal risk, and the evidence base, per the 2014 Cochrane review, remains insufficient to make this a routine recommendation."
      }
    ]
  },
  {
    "article_id": 383,
    "article_title": "Laceration",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Hemostasis is addressed first with direct pressure (tourniquet only if necessary), then the wound is assessed for depth and involvement of deeper structures - special vigilance is used with any neck laceration, given the proximity of the carotid arteries, jugular veins, trachea, and esophagus. For facial or intraoral lacerations, the mechanism is asked about (a fall while running with an object in the mouth is classic for palatal injury). While any laceration is evaluated, whether the location and pattern fit the stated mechanism is noted: greater concern for abuse is warranted when injuries are patterned (loop, cord, or belt marks) or located on soft-tissue areas (ears, neck, abdomen, buttocks, genitals) rather than bony prominences, when injuries are in multiple stages of healing, or when the laceration or bruise occurs in an infant who is not yet cruising or walking - \"children who don't cruise rarely bruise\" is a useful reminder that unexplained injury in this age group deserves careful scrutiny rather than routine reassurance."
      },
      {
        "title": "Diagnosis",
        "content": "Any palatal or oropharyngeal laceration extending laterally is treated as a potential great-vessel injury - MR angiography is pursued if worrisome neurologic signs or symptoms develop."
      },
      {
        "title": "Management",
        "content": "Admission for observation is arranged for any palatal or oropharyngeal laceration extending laterally, given its potential great-vessel injury risk. For a cervicofacial laceration from a dog bite, special suturing technique is anticipated, generally under conscious sedation, with general anesthesia reserved for extensive tissue defects. Topical LET (4% lidocaine, 1:2000 epinephrine, 0.5% tetracaine) is used for straightforward lacerations amenable to topical anesthesia, with 20-30 minutes allowed for effect and blanching at the site watched for as a sign of adequate anesthesia before proceeding, since fear and lack of cooperation can otherwise make repair difficult in children."
      }
    ]
  },
  {
    "article_id": 384,
    "article_title": "Nocturnal Enuresis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "The history specifically covers the number of wet nights per week, the longest stretch of dryness ever achieved, evening fluid intake, daytime voiding frequency and symptoms (urgency, straining, weak stream, dribbling), constipation, and snoring or mouth breathing. The family is directly asked about a parental history of childhood bedwetting, since this is rarely volunteered but carries strong prognostic value. In a previously dry child with new-onset enuresis, abuse or a new emotional stressor is considered as a possible trigger and screened for accordingly. The child is classified as having monosymptomatic (nighttime-only) or nonmonosymptomatic (with daytime symptoms) enuresis, since this determines whether further evaluation is needed — monosymptomatic enuresis with a reassuring history and exam requires no further workup, while nonmonosymptomatic enuresis warrants closer attention to bladder/bowel dysfunction and possible urology involvement."
      },
      {
        "title": "Diagnosis",
        "content": "On exam, hypertension or [[246|growth failure]] (chronic renal disease) is checked for, and a genital exam is performed for meatal stenosis or labial fusion, along with an abdominal exam for an enlarged bladder or kidneys. Urinalysis and culture are sent to exclude infection, and urine specific gravity is noted to screen for a concentrating defect. Imaging (renal ultrasound, VCUG) is reserved for children over age 10 with persistent enuresis or when history/exam suggests an organic cause (obstructive symptoms, [[187|hematuria]], hypertension, growth failure), rather than ordered routinely."
      },
      {
        "title": "Management",
        "content": "Treatment starts with behavioral modification and alarm therapy as first-line treatment, particularly effective in younger children, and medication is reserved for older children, those with additional symptoms, or those who fail behavioral/alarm therapy. Constipation and ADHD are treated concurrently if present, since untreated comorbidities can undermine enuresis treatment."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Parental history of bedwetting carries strong prognostic value: 40% risk with one affected parent, 70% with both. Families are reassured that nocturnal enuresis causes no physical harm and has a high rate of spontaneous resolution, while its emotional impact on the child is still validated and addressed."
      }
    ]
  },
  {
    "article_id": 385,
    "article_title": "Laryngomalacia",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Laryngomalacia is suspected in an infant with inspiratory stridor beginning in the first 2-6 weeks of life that worsens with crying, feeding, agitation, and supine positioning, and improves prone and at rest - this pattern, together with normal oxygen saturation and a normal chest radiograph, supports an upper-airway (supraglottic) source rather than lower respiratory disease. Early airway examination (rather than waiting) is obtained in infants presenting under 4 weeks of age or with severe obstruction, since these presentations warrant ruling out an alternative cause. If stridor sounds wet, is accompanied by cough with feeds, or there is a history of recurrent respiratory illness or pneumonia, evaluation for dysphagia is warranted, since laryngomalacia can impair suck-swallow-breath coordination. If stridor worsens or persists beyond the expected improving trajectory instead of following the typical course, reassessment for an alternate or coexisting diagnosis (such as an enlarging subglottic hemangioma, vocal cord paralysis, or subglottic stenosis) is warranted rather than continuing to attribute symptoms to uncomplicated laryngomalacia."
      },
      {
        "title": "Diagnosis",
        "content": "Diagnosis is confirmed with awake flexible fiberoptic laryngoscopy, looking for the omega-shaped epiglottis, short aryepiglottic folds, and inspiratory prolapse of the arytenoid mucosa/cuneiform cartilage. Dysphagia is evaluated with a contrast swallow study or FEES when suspected. For infants with moderate to severe obstruction, complete bronchoscopy is performed, since 15-60% have a synchronous airway anomaly that would otherwise be missed."
      },
      {
        "title": "Management",
        "content": "Families are reassured that most laryngomalacia is mild and self-limited, and is managed expectantly with positioning and treatment of any coexisting GERD. Reflux is screened for and treated, since GERD/laryngopharyngeal reflux can worsen severity and prolong the clinical course. Surgical evaluation (supraglottoplasty) is pursued for stridor at rest with retractions and increased work of breathing, or for chronic signs such as failure to thrive, [[311|obstructive sleep apnea]], hypoxemia, or severe dyspnea - these more severe presentations occur in only about 10-22% of cases."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Symptoms typically peak by about 6 months, improve from 7-9 months, and resolve completely by 12-18 months in the majority of infants."
      }
    ]
  },
  {
    "article_id": 386,
    "article_title": "Parasitic Infection",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Broad parasitic workup is reserved for children with a specific risk factor — travel to or residence in an endemic area, daycare attendance with a known outbreak, exposure to contaminated water (well water, a pool, a stream), or pet/animal contact — rather than ordering an O&P reflexively on every child with loose stools. Giardiasis is suspected in a child with diarrhea and a history of exposure to potentially contaminated water (well water, a stream, or even a treated pool, since Giardia resists chlorination), daycare attendance, or a household contact with similar symptoms — remembering that 25% of infected individuals are asymptomatic, so an asymptomatic carrier in the household can be the ongoing source. Because pets are rarely a source of human Giardia infection (due to host-specific strain differences), exposure history focuses on water sources, daycare, and person-to-person contact rather than the family dog or cat."
      },
      {
        "title": "Diagnosis",
        "content": "Before parasitic testing is ordered in a child with diarrhea, pretest probability is considered: more than 90% of stool O&P exams in the US are negative, and helminths are rarely the cause of diarrhea. When protozoal infection (Giardia, Cryptosporidium, Entamoeba) is genuinely suspected, molecular (PCR-based) stool testing is favored over traditional O&P microscopy, since these are now the more accurate and commonly used diagnostic approach for these organisms."
      },
      {
        "title": "Management",
        "content": "When antiparasitic treatment is selected for any confirmed parasitic infection, FDA approval status and pediatric-specific indications are verified before prescribing, since the antiparasitic drug landscape includes agents with limited approval or that are available only through the CDC."
      }
    ]
  },
  {
    "article_id": 387,
    "article_title": "Metabolic Acidosis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In an acutely ill child, diarrhea (stool bicarbonate loss), shock/lactic acidosis (perfusion is assessed carefully - dehydration, blood loss, sepsis, and heart disease can all present this way), and DKA are considered the most common acute causes. In a child with ketosis and only mild acidosis (bicarbonate above 18 mEq/L) attributed to poor intake, a concurrent illness such as gastroenteritis is actively sought, since starvation ketosis alone rarely explains significant acidosis. Metabolic acidosis with seizures or depressed sensorium in an infant is treated as a possible inborn error of metabolism until proven otherwise, while meningitis/sepsis with lactic acidosis is considered the more common explanation when neurologic signs and acidosis coexist without a metabolic-disease history. In a child with failure to thrive and chronic acidosis, evaluation for renal insufficiency or renal tubular acidosis is undertaken. Medication exposure and possible [[338|toxic ingestion]] (ethylene glycol, methanol) are always asked about, since these are treatable causes with excellent response to specific therapy when identified promptly."
      },
      {
        "title": "Diagnosis",
        "content": "BUN, creatinine, glucose, urinalysis, and electrolytes are obtained as baseline studies, and the anion gap is calculated to narrow the differential. For DKA, glucose, urine ketones and glucose are checked. Accompanying hypoglycemia or hyperammonemia is checked for when an inborn error of metabolism is suspected. Evaluation for renal insufficiency or renal tubular acidosis includes Fanconi syndrome-associated type II RTA (normoglycemia with glycosuria) and adrenal insufficiency (acidosis with hypoglycemia)."
      },
      {
        "title": "Management",
        "content": "Treatment is directed first at correcting the underlying cause - rehydration and treatment of the precipitating illness, rather than bicarbonate, resolves most cases. Fluid balance is corrected in infants with a dilutional component to their acidosis. For chronic acidosis from ongoing bicarbonate loss, bicarbonate supplementation is added directly to feeds. Reflexive intravenous sodium bicarbonate bolus for acute acidosis is avoided: it is reserved for severely unstable, persistently acidotic infants who have failed other measures, and only when the infant is intubated/ventilated or breathing well enough spontaneously to clear the resulting CO2 load, given the risks of volume overload, [[379|intracranial hemorrhage]], hypernatremia, worsened respiratory acidosis, impaired oxygen delivery, and paradoxical intracellular acidosis. Families are counseled that chronic acidosis causes reversible [[246|growth failure]], and that adequate correction (for example, in [[284|chronic kidney disease]] with bicarbonate or citrate) is important specifically for growth and bone health, not simply for normalizing a lab value."
      }
    ]
  },
  {
    "article_id": 388,
    "article_title": "Phenylketonuria (Pku)",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "If an infant is not caught by screening, a characteristic musty/mousy odor, fair complexion relative to family members, [[288|eczema]], vomiting, or irritability should prompt urgent phenylalanine testing rather than waiting for developmental delay to become apparent."
      },
      {
        "title": "Diagnosis",
        "content": "When a newborn screen returns positive for PKU, the diagnosis is confirmed with further testing (quantitative phenylalanine level, and genetic testing as indicated). It is verified that the state's newborn screen was actually performed, given that many primary care clinicians are now unfamiliar with untreated PKU phenotypes precisely because screening has made the untreated disease rare. A urine ferric chloride test can be done acutely for an infant not caught by screening. For a newborn of a mother with known PKU, phenylalanine levels are measured once enteral feeding is established, and early quantitative amino acid analysis is considered rather than relying on routine newborn screening alone, given the child's elevated background risk (about 1 in 80) and the possibility of in-utero phenylalanine-related effects (microcephaly, congenital heart disease, intellectual disability) even in a heterozygous, unaffected infant if maternal phenylalanine control was inadequate during pregnancy."
      },
      {
        "title": "Management",
        "content": "A low-protein diet and phenylalanine-free medical formula are started as soon as possible, without waiting for confirmatory results before beginning dietary intervention. Confirmed PKU is managed with a lifelong phenylalanine-restricted diet under the guidance of a metabolic clinic and a nutritionist experienced in PKU, aiming for good phenylalanine control by 3-4 weeks of age and sustained control thereafter. Continued breastfeeding is supported where desired, but phenylalanine levels are monitored closely given ongoing intake from breast milk. Patients and families are counseled to avoid aspartame."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Delay in starting treatment risks irreversible intellectual disability, since damage becomes irreversible by about 8 weeks of age, and sustained phenylalanine control is aimed at maximizing neuropsychological outcome."
      }
    ]
  },
  {
    "article_id": 389,
    "article_title": "Neurofibromatosis Type 1",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Cafe-au-lait macules are expected from birth, freckling by adolescence in about 75% of cases, and Lisch nodules on slit-lamp exam in about 75% of prepubescent children after age 3 - so a young child may only show cafe-au-lait spots initially. In counseling families, both parents are evaluated carefully, since about half of cases are inherited (autosomal dominant, nearly full penetrance) and half are new mutations - this distinction matters for genetic counseling of the family."
      },
      {
        "title": "Diagnosis",
        "content": "The 2-of-7 criteria are applied systematically: 6 or more cafe-au-lait macules (over 5 mm prepubertal, over 15 mm postpubertal), 2 or more neurofibromas of any type or 1 plexiform neurofibroma, axillary/inguinal freckling, optic pathway glioma, 2 or more Lisch nodules, a distinctive osseous lesion, or a first-degree relative with NF1. When a child has 6 or more cafe-au-lait macules but no other criterion yet, NF1 is not dismissed - the child is followed clinically, since about 95% eventually meet full diagnostic criteria (usually by 8-10 years of age). Referral to ophthalmology for slit-lamp exam and screening is made whenever NF1 is suspected or diagnosed, given the risk of Lisch nodules and, more importantly, optic pathway glioma (occurring in 15-20% of NF1 children, usually before age 6), which can cause visual loss or [[222|precocious puberty]]."
      },
      {
        "title": "Management",
        "content": "Expectations are set that NF1 manifestations emerge over time rather than all at once, and that about two-thirds of patients have a mild course while the remaining third face a range of unpredictable complications - so periodic, structured monitoring (rather than one-time reassurance) is the right model of care. [[114|Learning disability]] is actively screened for and addressed, since it affects 30-60% of children with NF1 and is a major driver of quality of life, independent of physical manifestations. Signs of vascular dysplasia (moyamoya arteriopathy, in 3-7% of children) are watched for if new neurologic symptoms develop."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Optic pathway and brainstem gliomas in NF1 tend to behave more indolently than in children without NF1, which can inform a more conservative initial approach to management in consultation with neuro-oncology."
      }
    ]
  },
  {
    "article_id": 390,
    "article_title": "Polycystic Ovary Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In an adolescent at least 2 years post-menarche with irregular cycles (under 21 or over 45 days in years 1-3 post-menarche, or under 21/over 35 days or fewer than 8 cycles/year beyond that, or any cycle over 90 days), evaluation is made for PCOS. True virilization (clitoromegaly, voice change, rapidly progressive hirsutism) is specifically watched for — this is not consistent with PCOS and should prompt evaluation for a more severe androgen-excess condition instead."
      },
      {
        "title": "Diagnosis",
        "content": "Evaluation is made for both hyperandrogenism (clinical: hirsutism, moderate-to-severe acne, male-pattern alopecia; biochemical: elevated free/total testosterone, DHEA-S, androstenedione) and other causes of irregular cycles (thyroid dysfunction, hyperprolactinemia) are excluded before PCOS is diagnosed — this evaluation is done before oral contraceptives are started for the irregular cycles, since starting hormonal therapy first can mask the underlying picture. Pelvic ultrasound is not relied upon in this age group: polycystic-appearing ovaries are a normal finding in many adolescents from ongoing pubertal anovulatory cycles, so the adult ultrasound criterion should not be applied."
      },
      {
        "title": "Management",
        "content": "Once PCOS is diagnosed, its common comorbidities are screened for, especially in an overweight or obese adolescent: lipid panel, glucose tolerance/HbA1c for type 2 diabetes risk, evaluation for [[311|obstructive sleep apnea]], and screening for depression and anxiety. Lifestyle intervention is emphasized as first-line management — even a 5-10% weight loss can meaningfully improve symptoms — and it is explained that a BMI over 30 limits fertility, so weight management also serves reproductive goals. For endometrial protection, at least 4 menstrual periods per year are ensured unless the patient is on contraception, given the endometrial cancer risk from chronic anovulation and unopposed estrogen. Further treatment (hormonal therapy, antiandrogens, metformin) is individualized based on the patient's predominant symptoms — menstrual irregularity, hyperandrogenism, or metabolic features — rather than a one-size-fits-all regimen."
      }
    ]
  },
  {
    "article_id": 391,
    "article_title": "Oligohydramnios",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "When reviewing prenatal history, a documented MVP under 2 cm is treated as oligohydramnios and the likely cause is specifically asked about: membrane rupture, placental insufficiency, postdate gestation, chronic hypertension, or a suspected fetal renal/urinary anomaly. On the newborn exam, the Potter sequence facies (recessed chin, low-set posteriorly rotated ears, flattened or beaked nose, suborbital creases) and limb findings (clubfoot/clubhand, joint contractures, hip dislocation) are actively looked for whenever oligohydramnios was noted antenatally."
      },
      {
        "title": "Diagnosis",
        "content": "In a male newborn with prenatal oligohydramnios and hydronephrosis, evaluation is made for [[399|posterior urethral valves]] (voiding difficulty, poor stream, urinary ascites) as well as bilateral renal agenesis or severe cystic renal disease, since these differ substantially in management and prognosis despite a similar antenatal fluid picture. For infants who survive the immediate perinatal period, the broader pattern of associated anomalies (cardiac defects, GI atresias, imperforate anus, Pierre Robin sequence) is screened for rather than assuming an isolated renal or pulmonary problem."
      },
      {
        "title": "Management",
        "content": "Respiratory distress from pulmonary hypoplasia is anticipated - a low threshold for respiratory support is kept, and preparation is made for [[396|pneumothorax]]. Because severe oligohydramnios from bilateral renal agenesis or severe renal dysplasia carries an extremely high mortality risk (respiratory insufficiency from pulmonary hypoplasia), antenatal counseling is coordinated with maternal-fetal medicine and neonatology as soon as significant oligohydramnios with a suspected renal cause is identified, so families understand the prognosis before delivery. Developmental dysplasia of the hip is screened for in any infant with a history of oligohydramnios, since intrauterine crowding increases this risk; most minor ultrasound findings between 6 weeks and 4 months resolve with observation, but referral to orthopedics is made if clinical instability (positive Barlow test) persists."
      }
    ]
  },
  {
    "article_id": 392,
    "article_title": "Post-Concussion Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Any child with a blow to the head, face, neck, or body is evaluated for the five symptom categories of [[200|concussion]]: somatic (headache, dizziness, nausea, light/noise sensitivity, fatigue), vestibular, cognitive (amnesia, confusion, difficulty concentrating), emotional (irritability, anxiety), and sleep-related. Loss of consciousness occurs in fewer than 5% of concussions and does not predict severity or recovery time, so its absence should not be reassuring nor its presence alarming on its own. Risk factors for prolonged recovery — female sex, [[308|migraine]] history, prior concussion, family/social stressors, a neurodevelopmental disorder, or psychiatric illness — are specifically asked about, since initial symptom burden combined with these factors helps anticipate which children are more likely to develop persistent postconcussion symptoms."
      },
      {
        "title": "Diagnosis",
        "content": "Laboratory workup (CBC, electrolytes, glucose, toxicology, coagulation studies) is reserved for significant [[139|head trauma]] or altered consciousness, rather than routine concussion presentations."
      },
      {
        "title": "Management",
        "content": "Management starts with cognitive and physical rest, favoring a reduction rather than complete elimination of activity, with the plan individualized to the child's specific symptom spectrum. A stepwise, progressive return-to-activity program is used for both school and sport, advancing physical and cognitive demands gradually while monitoring for symptom recurrence at each stage — advancement does not continue if symptoms return. Athletes and families are counseled that a second head injury before full recovery from the first risks second impact syndrome, a catastrophic and sometimes fatal complication, so strict avoidance of return to play until complete symptom resolution is essential. Referral for formal neuropsychological or neurobehavioral testing is made when recovery extends beyond the usual 7-10 day window or symptoms are substantially interfering with school or daily function. For athletes with a history of multiple concussions, especially those from progressively lesser force, taking longer to resolve, or showing a change from baseline, a more conservative eligibility decision is favored for continued contact or collision sport participation."
      }
    ]
  },
  {
    "article_id": 393,
    "article_title": "Peanut Allergy",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Every infant is stratified by [[288|eczema]] severity and egg-allergy status before deciding on peanut introduction timing. Any presentation of rash, swelling, and wheezing after peanut exposure is treated as [[143|anaphylaxis]]."
      },
      {
        "title": "Diagnosis",
        "content": "For an infant with severe eczema, egg allergy, or both, referral for peanut-specific IgE and/or skin prick testing (with an oral food challenge if results are indeterminate) is strongly considered before peanut is introduced; a skin prick wheal of 0-2 mm is interpreted as low risk (introduce at home or in a supervised office feeding), 3-7 mm as moderate-to-severe risk (refer to a specialist or arrange supervised office feeding), and 8 mm or more as very likely allergic (continue management with a specialist) - the same risk tiers apply to peanut-specific IgE using the 0.35 kUA/L cutoff. After stabilization from a reaction, a complete allergy evaluation and allergist referral are arranged for any child suspected of having peanut allergy - history alone is not relied upon given the risk of both under- and overdiagnosis."
      },
      {
        "title": "Management",
        "content": "For an infant with severe eczema, egg allergy, or both, introduction is aimed for as early as 4-6 months once safety is established, per the risk tier identified on testing. For an infant with mild-to-moderate eczema, peanut-containing foods are introduced around 6 months without needing prior testing. For an infant with no eczema or known food allergy, peanut-containing foods are introduced whenever age-appropriate, per family preference and cultural practice. Families are not counseled to delay peanut introduction as a preventive strategy, even with a strong family history of allergy - the evidence instead supports early, regular introduction (at least 6 g of peanut protein over 3+ meals weekly in high-risk infants) as protective. Epinephrine is given promptly for any reaction, along with antihistamines and systemic corticosteroids, and observation for a late-onset (biphasic) reaction occurs before discharge. The family is equipped with a written avoidance plan, instruction on careful food-label reading, an epinephrine auto-injector to be carried at all times, and a medical alert bracelet."
      },
      {
        "title": "Prognosis and outcome",
        "content": "The evidence (LEAP trial) supporting early, regular peanut introduction in high-risk infants shows it is protective, cutting allergy risk from about 17% to about 3% by age 5 in that population. Families are counseled that most children with peanut allergy do not outgrow it, and that any resolution occurs almost exclusively within the first 5 years of life - so ongoing allergist follow-up and periodic reassessment (rather than a one-time diagnosis) is the appropriate long-term model of care."
      }
    ]
  },
  {
    "article_id": 394,
    "article_title": "Primary Amenorrhea",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "The proactive evaluation thresholds are applied rather than waiting until age 16: referral or workup is begun for a girl with no menses by age 15 despite normal growth and secondary sexual characteristics, no menses more than 3 years after thelarche onset, or no secondary sexual characteristics at all by age 13. Evaluation is prompt, regardless of age, if delayed secondary sexual development accompanies the amenorrhea or if cyclic pelvic pain is present alongside primary amenorrhea, since the latter suggests an outflow tract obstruction (imperforate hymen, transverse vaginal septum) with trapped menstrual blood. In a competitive female athlete, any positive menstrual-history screening question (absent menarche by 15, menarche not within 5 years of initial breast development) is treated as a trigger for further endocrine and gynecologic evaluation, with low energy availability considered alongside other causes."
      },
      {
        "title": "Diagnosis",
        "content": "Pregnancy is always ruled out first, even in a girl who denies sexual activity and even though primary amenorrhea from pregnancy is rare. Given that chromosomal/gonadal dysgenesis (especially Turner syndrome) and outflow tract anomalies (Müllerian agenesis, imperforate hymen, transverse vaginal septum) together account for the majority of primary amenorrhea, pubertal staging and external genitalia are examined carefully, and karyotype and pelvic imaging are considered early rather than late in the workup. If secondary sexual characteristics (especially breast development) are present but pubic/axillary hair is sparse or absent, androgen insensitivity syndrome is considered and LH/FSH and karyotype are checked. If the clinical picture suggests chronic illness, undernutrition, excessive exercise, or disordered eating, hypothalamic suppression is evaluated for as a diagnosis of exclusion — but only after structural and chromosomal causes have been reasonably excluded, since hypothalamic dysfunction should not be assumed by default."
      },
      {
        "title": "Management",
        "content": "Cyclic pelvic pain alongside primary amenorrhea points to an outflow tract obstruction with trapped menstrual blood that needs timely surgical attention."
      }
    ]
  },
  {
    "article_id": 395,
    "article_title": "Short Bowel Syndrome",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Watch is kept for [[354|chronic diarrhea]], [[214|malnutrition]], and failure to thrive as the presenting pattern. If abdominal wall edema, [[353|cellulitis]], distention, or crepitus develop, this is treated as a sign of delayed recognition of a severe complication requiring urgent attention, since delay risks severe SBS or death."
      },
      {
        "title": "Diagnosis",
        "content": "In a neonate who has undergone significant small bowel resection — most often for necrotizing enterocolitis, but also intestinal atresia, gastroschisis, or volvulus — short bowel syndrome is anticipated and the specific prognostic factors are assessed early: residual bowel length, whether the ileocecal valve and ileum were preserved, whether the colon is intact, and the health of other digestive organs (stomach, pancreas, liver). Colitis-like symptoms are monitored closely when enteral feeding is initiated. The specific prognostic factors are tracked over time — residual bowel adaptive potential, infection frequency, and the function of other organs — to guide the pace of weaning from parenteral nutrition and to identify children who may eventually need consideration for intestinal transplantation."
      },
      {
        "title": "Management",
        "content": "Total parenteral nutrition is started in the immediate postoperative period to meet caloric, fluid, and electrolyte needs while the bowel is insufficient, but enteral feeding is introduced as early as feasible, since this maximizes enteric hormonal stimulation and promotes bowel adaptation (elongation, hypertrophy, and slowed peristalsis) rather than leaving the bowel unstimulated. A multidisciplinary short bowel program is involved early, given the substantial survival benefit these programs and improved catheter/PNALD management have demonstrated."
      },
      {
        "title": "Prognosis and outcome",
        "content": "An NEC or gastroschisis etiology tends to predict a more prolonged clinical course than other causes. Recovery can take years, sometimes requiring TPN for the first several years of life, and over 90% survival has been demonstrated in recent series."
      }
    ]
  },
  {
    "article_id": 396,
    "article_title": "Pneumothorax",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a neonate with respiratory distress - especially a premature infant with surfactant deficiency, a meconium aspiration history, or one receiving positive pressure ventilation or high PEEP - a high suspicion for pneumothorax is maintained, since it can progress rapidly to a tension pneumothorax. In a child with asthma who acutely deteriorates, particularly on mechanical ventilation, pneumothorax or pneumomediastinum is suspected even without classic findings, since up to 30% of associated pneumomediastinum cases are initially missed on radiography - a low threshold is kept to repeat imaging or escalate care. In a tall, thin adolescent male presenting with sudden chest pain and dyspnea without trauma, primary spontaneous pneumothorax is considered, with smoking, vaping, or drug use (marijuana, cocaine, MDMA) asked about. In a child with known asthma, cystic fibrosis, or another chronic lung disease presenting with pneumothorax, it is classified as secondary spontaneous pneumothorax. Iatrogenic causes (recent central line placement, intubation, biopsy, or mechanical ventilation) are considered in any hospitalized child who develops sudden respiratory decline. In an adolescent female with recurrent spontaneous pneumothorax temporally linked to menstruation, the rare diagnosis of catamenial pneumothorax is considered."
      },
      {
        "title": "Diagnosis",
        "content": "CT imaging for apical blebs is considered if recurrence or diagnostic uncertainty exists; an underlying connective tissue disorder (Marfan syndrome, Ehlers-Danlos syndrome) is also considered if there are supporting physical features or family history."
      },
      {
        "title": "Management",
        "content": "For significant respiratory distress with suspected pneumothorax, decompression is done immediately with a large syringe, 20-gauge needle, or catheter-over-needle and three-way stopcock at the fourth intercostal space anterior axillary line or the second intercostal space midclavicular line, then an 8F chest tube is placed using standard technique. For a child with known chronic lung disease presenting with secondary spontaneous pneumothorax, the underlying disease is addressed alongside the acute air leak. Appropriate referral is made for catamenial pneumothorax, since standard management alone will not address the underlying diaphragmatic defect. Even a small, seemingly stable pneumothorax in a child should prompt admission for observation given its potential to progress."
      }
    ]
  },
  {
    "article_id": 397,
    "article_title": "Substance Intoxication",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Passive or environmental exposure (transplacental, breast milk, inhalation, or presence where drugs are used or manufactured) is considered in an infant or young child with unexplained intoxication signs, and substance use or withdrawal is considered in any adolescent with chronic, persistent irritability."
      },
      {
        "title": "Diagnosis",
        "content": "Airway, breathing, circulation, and mental status assessment are prioritized immediately in any child with suspected substance intoxication, before a detailed history or diagnostic workup is pursued. Once stabilized, a comprehensive history is gathered from witnesses, family, and friends about the nature of the substance, timing, and circumstances, recognizing that a clear history is often unavailable and that toxicology screening does not always clarify the picture — a high index of suspicion is maintained regardless. Examination for pallor (hemolysis) or cyanosis (methemoglobinemia) is performed as clues to specific toxic mechanisms, and evaluation for ataxia and metabolic derangement (hypoglycemia, [[170|hyponatremia]], hyperammonemia) is done alongside the standard exam."
      },
      {
        "title": "Management",
        "content": "The standard sequence is followed: stabilize ABCs, remove the source of poison, provide supportive care, decontaminate (GI tract, skin, eyes, or other exposed body cavity as relevant), consider measures to hasten elimination of absorbed toxin, and give a specific antidote when one exists. For adolescents specifically, screening for alcohol use is done proactively at every visit rather than waiting for a presentation of intoxication, given that alcohol is the most commonly abused substance in this age group and binge drinking prevalence rises sharply with age (about 50% of drinkers at 12-14 years to about 72% at 18-20 years); alcohol exposure in children can come from unexpected sources like hand sanitizer, mouthwash, and food extracts, not just beverages. Prevention is emphasized — safe storage of medications and household chemicals, anticipatory guidance for families with toddlers, and routine adolescent substance-use screening — since prevention is more effective than intervention after intoxication has already occurred."
      }
    ]
  },
  {
    "article_id": 398,
    "article_title": "Polytrauma",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Every child with polytrauma is approached using the ABCDE sequence, with airway prioritized above all else, since airway compromise kills faster than any other injury - assessment is made for obstruction from positioning, blood, teeth, vomitus, or foreign material, and level of consciousness, maxillofacial injury, and stridor or cyanosis are evaluated. Internal injury is actively suspected whenever the mechanism of injury is severe enough to cause it, even in the complete absence of external signs of trauma, given children's thinner protective musculature and padding. A normal blood pressure does not rule out significant blood loss - children can lose 25-30% of their circulating volume while maintaining a normal systolic pressure."
      },
      {
        "title": "Diagnosis",
        "content": "A length-based tool is used to estimate weight quickly for accurate drug dosing and equipment sizing rather than waiting for an actual weight. Other perfusion markers (heart rate, capillary refill, mental status) are relied upon rather than blood pressure alone to assess for hemorrhagic shock. The Pediatric Trauma Score is used to help gauge severity."
      },
      {
        "title": "Management",
        "content": "The cervical spine is protected throughout the assessment and stabilization process in every child with polytrauma, regardless of the apparent primary injury site. If a child remains in shock despite adequate initial fluid/blood resuscitation, the differential is broadened beyond ongoing hemorrhage to include neurogenic shock, cardiac contusion, and cardiac tamponade, and investigated accordingly rather than simply escalating volume resuscitation. Care is organized under a single multidisciplinary team leader when multiple specialties (neurosurgery, orthopedics, general/trauma surgery, plastic surgery) are involved, and continuous monitoring is maintained after initial resuscitation, since deterioration can occur even after apparent stabilization. For very low Pediatric Trauma Scores, rapid transport to the nearest facility is prioritized over transfer to a more specialized but more distant center. Psychological and social support is built into the care plan from the time of resuscitation onward."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Polytrauma can affect the developing brain and contribute to long-term morbidity beyond the physical injuries themselves."
      }
    ]
  },
  {
    "article_id": 399,
    "article_title": "Posterior Urethral Valves",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Bilateral hydronephrosis in a male infant, whether identified prenatally or postnatally, is treated as an urgent indication to exclude posterior urethral valves. In a neonate with a palpable [[235|abdominal mass]], hypertension, urinary ascites, or unexplained renal failure, PUV is included in the differential. Parental report of a weak urinary stream is not relied upon to trigger evaluation, since most children with PUV are not brought in for this symptom specifically - suspicion is maintained based on the broader clinical picture (vomiting, poor weight gain, abdominal distention, recurrent UTI) since more than half of cases are not diagnosed until several months of age. In an older boy with incontinence, recurrent UTI, or unexplained renal impairment, previously unrecognized PUV is considered as part of the work-up."
      },
      {
        "title": "Diagnosis",
        "content": "A voiding cystourethrogram, the key diagnostic study, is obtained, looking for a dilated/elongated posterior urethra, thickened trabeculated bladder, bladder neck hypertrophy, and [[271|vesicoureteral reflux]]. Renal function (creatinine, BUN) and electrolytes are checked at diagnosis, and evaluation for vesicoureteral reflux is performed, since about half of neonates with PUV have VUR."
      },
      {
        "title": "Management",
        "content": "Endoscopic fulguration of the valves is arranged as early as feasible once the diagnosis is confirmed; cutaneous vesicostomy or another temporary diversion is reserved for very small infants in whom endoscopic treatment is not practical. Prophylactic antibiotics are considered for higher-grade (3-5) reflux in infants and young children, weighing this against the risks of prolonged antibiotic exposure. Nephrectomy is considered for a kidney with severely impaired function that does not improve with temporary nephrostomy, or that is a source of severe hypertension or recurrent infection."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Expectations are set with families that unilateral disease with contralateral renal sparing carries a better prognosis than bilateral involvement, and that even after technically successful valve ablation, about 30% of patients progress to chronic or end-stage renal disease because of underlying renal dysplasia established before birth - so long-term nephrology follow-up is needed regardless of surgical success."
      }
    ]
  },
  {
    "article_id": 400,
    "article_title": "Thrombocytopenia",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In an otherwise healthy 1- to 10-year-old presenting with sudden bruising, petechiae, or mucosal bleeding 1-4 weeks after a viral illness or vaccination, a CBC and peripheral smear are obtained. In a newborn with thrombocytopenia, maternal history (preeclampsia, autoimmune disease, medications) is evaluated alongside neonatal causes (alloimmunization, [[155|congenital infection]], sepsis, NEC)."
      },
      {
        "title": "Diagnosis",
        "content": "Isolated thrombocytopenia with large platelets, normal white count and hemoglobin, normal PT/PTT, and no hepatosplenomegaly or lymphadenopathy is classic for ITP and needs no further testing initially. Pseudothrombocytopenia is ruled out first if the count seems inconsistent with the clinical picture, by redrawing in a citrate or heparin tube rather than EDTA. New medications (sulfonamides, vancomycin, valproic acid, phenytoin, carbamazepine, heparin) are specifically asked about as a cause of drug-induced thrombocytopenia, which should improve within 1-2 days of stopping the offending drug. If pancytopenia, anemia, organomegaly, lymphadenopathy, or an abnormal PT/PTT accompanies the thrombocytopenia, the workup is broadened (bone marrow exam, direct Coombs, ANA) to evaluate for leukemia, autoimmune disease, hemolytic uremic syndrome, or a marrow failure syndrome rather than assuming simple ITP. If thrombocytopenia persists beyond 3-6 months, additional testing (HIV, hepatitis C, H. pylori, ANA, anticardiolipin antibodies) is pursued rather than continuing to assume self-limited acute ITP. Hematology is consulted if newborn thrombocytopenia persists beyond 10 days of life."
      },
      {
        "title": "Management",
        "content": "For classic ITP without significant bleeding, observation with serial platelet counts is a reasonable initial approach. Active treatment (IVIG, corticosteroids, or other agents) is reserved for significant bleeding or very low platelet counts, and platelet transfusion is used to manage an acute bleeding crisis. In a menstruating adolescent with ITP, close monitoring for heavy menstrual bleeding occurs if the platelet count falls below 10,000/µL."
      },
      {
        "title": "Prognosis and outcome",
        "content": "For classic ITP, 60-75% resolve within 2-4 months regardless of treatment. Families are counseled that [[379|intracranial hemorrhage]], while the most serious complication, occurs in under 1% of ITP cases; warning signs (severe headache, neurologic change) are nonetheless emphasized given the roughly one-third mortality when ICH does occur."
      }
    ]
  },
  {
    "article_id": 401,
    "article_title": "Tinea Versicolor",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "Tinea versicolor is suspected in an adolescent or young adult with multiple small, oval, scaly patches on the upper chest, back, or upper arms that vary in color (white, pink, tan, or reddish-brown) and notably fail to tan with sun exposure, appearing lighter than surrounding skin in summer. In an infant or young child, facial involvement is looked for instead, particularly the bilateral temples. It is distinguished from vitiligo (which shows depigmentation rather than fine scale and a positive KOH), pityriasis alba, seborrheic dermatitis, and pityriasis rosea based on distribution, scale character, and KOH findings; secondary syphilis is considered in a sexually active adolescent with an atypical or resistant presentation."
      },
      {
        "title": "Diagnosis",
        "content": "Diagnosis is confirmed with a Wood's lamp (yellowish-brown fluorescence) or KOH prep of a skin scraping, expecting the classic \"spaghetti and meatballs\" pattern of short hyphae and spore clusters."
      },
      {
        "title": "Management",
        "content": "Treatment starts with selenium sulfide 2.5% suspension or zinc pyrithione shampoo applied to the entire affected area (and surrounding skin) and left on overnight, repeated in 1 week and then monthly to prevent recurrence; the patient is warned about potential skin irritation from this regimen. Alternatively, a topical antifungal cream is prescribed twice daily for 1-2 weeks, or a single 400 mg dose of oral fluconazole for a simpler regimen in an adolescent or adult. Since Malassezia is normal skin flora and recurrence is common, advice is given on minimizing predisposing factors (excess heat, humidity, sweating, occlusive clothing) where practical."
      },
      {
        "title": "Prognosis and outcome",
        "content": "Patients are counseled that pigmentary changes (light or dark patches) can take weeks to months to fully resolve even after the infection itself has cleared, since this reflects residual pigment abnormality rather than persistent infection — this is expected and not treatment failure."
      }
    ]
  },
  {
    "article_id": 402,
    "article_title": "Trichomoniasis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a neonate with a thin, whitish or yellowish vaginal discharge appearing within the first 10 days of life, perinatally acquired trichomoniasis is considered; treatment is not generally needed since this is typically self-limited, and intense social investigation is not automatically warranted given the known perinatal transmission route. In sharp contrast, any diagnosis of trichomoniasis in an older infant or prepubertal child should prompt a careful investigation for sexual abuse, including involvement of child protective services, since vaginal trichomoniasis is rare before menarche. In a postpubertal adolescent with vaginal itching, malodorous frothy discharge, or dysuria, examination looks for a strawberry cervix (present in only about 2% visibly)."
      },
      {
        "title": "Diagnosis",
        "content": "Before concluding a urine specimen shows pathogenic T. vaginalis, it is confirmed that this is not the nonpathogenic GI contaminant Trichomonas hominis. A saline wet mount is performed, but its sensitivity is only 60-70%, so a negative result in a symptomatic patient should prompt further testing rather than ruling out infection."
      },
      {
        "title": "Management",
        "content": "Self-limited neonatal trichomonal infection acquired perinatally is not treated, since this generally resolves on its own. For postpubertal patients with confirmed infection, treatment follows current CDC guidelines, and sexual partners are treated simultaneously to prevent reinfection — the single biggest driver of ongoing transmission. Retesting is scheduled 3 months after treatment given the high reinfection rate, rather than assuming a single treatment course is sufficient. Mycoplasma genitalium and [[239|bacterial vaginosis]] are kept in mind as alternative or coexisting causes of persistent symptoms if a patient does not respond as expected to trichomoniasis treatment."
      }
    ]
  },
  {
    "article_id": 403,
    "article_title": "Urethritis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "In a child with dysuria accompanied by urethral discharge or blood spotting on the underwear, urethritis is considered. In a girl with dysuria and gross [[187|hematuria]] or blood spotting, careful examination is made for urethral prolapse (complete protrusion of urethral mucosa beyond the meatus), especially if she is young or from a lower socioeconomic background, to avoid progression to mucosal necrosis. In a child with a weak urinary stream or recurrent urinary symptoms, urethral stricture is considered. When evaluating acute urinary retention in an infant or child, severe acute cystitis, urethritis, meatitis (in boys), or vaginitis are considered the most common associated conditions. In a boy, urethral valves are suspected if there is straining or dysuria without complete retention rather than full retention. In a girl with retention, retention is not attributed to labial adhesions alone (even if severe), and an uncommon lesion such as a prolapsed ureterocele is considered."
      },
      {
        "title": "Diagnosis",
        "content": "A urethral smear and urine culture are obtained as part of the workup, since infectious causes—though less common in children than adults—still need to be identified when present. Trauma, chemical exposure (bubble baths, soaps), and the possibility of a foreign body are specifically asked about, since these are recognized noninfectious causes of urethritis in children. Voiding cystourethrogram or cystoscopy is pursued for diagnosis of urethral stricture. Severe constipation is checked for as a contributing cause of acute urinary retention. In a boy, examination is made specifically for urethral stricture or meatal stenosis with meatitis. For any child under 2, or any boy regardless of age, presenting with urinary tract symptoms, evaluation is made for a congenital anatomic abnormality such as [[271|vesicoureteral reflux]], since these are more prevalent in this population and affect long-term management and follow-up."
      },
      {
        "title": "Management",
        "content": "Prompt treatment (sitz baths, antibiotics, topical estrogen, or surgical referral if needed) is given for urethral prolapse."
      }
    ]
  },
  {
    "article_id": 404,
    "article_title": "Vulvovaginitis",
    "sections": [
      {
        "title": "Clinical paths",
        "content": "A detailed history is taken covering hygiene technique (front-to-back wiping), exposure to chemical irritants (bubble baths, soaps, detergents, pools/hot tubs), tight clothing, recent diarrhea, and perianal or nighttime itching, and the possibility of a foreign body is gently asked about, recognizing a young child may not recall or disclose this. On exam, visible discharge is distinguished from irritation/erythema alone - visible discharge raises the likelihood of a specific infectious cause to about 50%, whereas irritation without discharge more often reflects nonspecific vulvovaginitis from the combination of unestrogenized mucosa, absent labial protection, and alkaline pH that predisposes all prepubertal girls. Any prepubertal child with a sexually transmitted pathogen identified on vulvovaginal culture, or with [[106|pelvic inflammatory disease]], is treated as a sexual abuse concern requiring a full evaluation - this association is close to universal at this age."
      },
      {
        "title": "Diagnosis",
        "content": "A culture with sensitivities is obtained using a moistened cotton or urethral (Calgiswab) swab when a specific infectious cause is suspected, particularly with blood-tinged/serosanguineous discharge (raising concern for group A streptococcus or Shigella) or a history of recent respiratory illness or diarrhea. A diagnosis of nonspecific vaginitis is reserved for after other identifiable causes have been reasonably excluded, since many of these children have already had prior evaluations and treatment failures. Candida vulvovaginitis is considered only when a predisposing factor is present (diabetes, recent systemic antibiotics or steroids) in a prepubertal, diaper-free child, since Candida is otherwise an uncommon cause at this age despite being a frequent culprit in diaper dermatitis and in postpubertal vulvovaginitis; diagnosis is confirmed with KOH prep/wet mount."
      },
      {
        "title": "Management",
        "content": "Candida vulvovaginitis is treated with topical azole antifungals or, in adolescents, a single dose of oral fluconazole. For nonspecific vulvovaginitis, the majority of cases, first-line management focuses entirely on hygiene counseling (front-to-back wiping, wet wipes, gentle genital cleansing, avoiding perfumed soaps and other irritants) before escalating to antimicrobial therapy, since most children improve with these measures alone."
      }
    ]
  }
]